test: use isolated databases to parallelize all tests

[zepatrik]

Separating a few changes from #840

You can now also use go test -tags sqlite,nomysql to run tests against all DBs, except mysql. You can also omit the sqlite tags, which will just use all others. FYI @aeneasr

I got some errors when using the DBs started by docker, that might be related to cleanup I think. We'll have to fix those still.

--- FAIL: TestMigrate (34.72s)
    --- FAIL: TestMigrate/dsn=mysql (3.86s)
        --- FAIL: TestMigrate/dsn=mysql/case=applies_on_yes_flag (1.54s)
            helper.go:181: 
                        Error Trace:    helper.go:181
                                                                helper.go:221
                                                                migrate_test.go:130
                                                                testing.go:1034
                                                                testing.go:1203
                                                                testing.go:1433
                        Error:          Received unexpected error:
                                        this error should never be printed
                                        github.com/ory/x/cmdx.init
                                                /home/patrik/git/go/pkg/mod/github.com/ory/x@v0.0.389/cmdx/helper.go:28
                                        runtime.doInit
                                                /usr/lib/go/src/runtime/proc.go:6222
                                        runtime.doInit
                                                /usr/lib/go/src/runtime/proc.go:6199
                                        runtime.doInit
                                                /usr/lib/go/src/runtime/proc.go:6199
                                        runtime.main
                                                /usr/lib/go/src/runtime/proc.go:233
                                        runtime.goexit
                                                /usr/lib/go/src/runtime/asm_amd64.s:1571
                                        github.com/ory/x/cmdx.FailSilently
                                                /home/patrik/git/go/pkg/mod/github.com/ory/x@v0.0.389/cmdx/helper.go:36
                                        github.com/ory/keto/cmd/migrate.BoxDown
                                                /home/patrik/git/keto/cmd/migrate/down.go:65
                                        github.com/ory/keto/cmd/migrate.newDownCmd.func1
                                                /home/patrik/git/keto/cmd/migrate/down.go:40
                                        github.com/spf13/cobra.(*Command).execute
                                                /home/patrik/git/go/pkg/mod/github.com/spf13/cobra@v1.4.0/command.go:856
                                        github.com/spf13/cobra.(*Command).ExecuteC
                                                /home/patrik/git/go/pkg/mod/github.com/spf13/cobra@v1.4.0/command.go:974
                                        github.com/spf13/cobra.(*Command).Execute
                                                /home/patrik/git/go/pkg/mod/github.com/spf13/cobra@v1.4.0/command.go:902
                                        github.com/spf13/cobra.(*Command).ExecuteContext
                                                /home/patrik/git/go/pkg/mod/github.com/spf13/cobra@v1.4.0/command.go:895
                                        github.com/ory/x/cmdx.ExecBackgroundCtx.func1
                                                /home/patrik/git/go/pkg/mod/github.com/ory/x@v0.0.389/cmdx/helper.go:143
                                        golang.org/x/sync/errgroup.(*Group).Go.func1
                                                /home/patrik/git/go/pkg/mod/golang.org/x/sync@v0.0.0-20210220032951-036812b2e83c/errgroup/errgroup.go:57
                                        runtime.goexit
                                                /usr/lib/go/src/runtime/asm_amd64.s:1571
                        Test:           TestMigrate/dsn=mysql/case=applies_on_yes_flag
                        Messages:       std_out: Version                        Name            Status  
                                        20150100000001000000    networks        Applied 
                                        20201110175414000000    relationtuple   Applied 
                                        20201110175414000001    relationtuple   Applied 
                                        20210623162417000000    relationtuple   Applied 
                                        20210623162417000001    relationtuple   Applied 
                                        20210914134624000000    legacy-cleanup  Applied 
                                        20220217152313000000    nid_fk          Applied 
                                        20220512151000000000    indices         Applied 
                                        
                                        std_err: Could apply down migrations: invalid connection
                                        error committing or rolling back transaction: error executing migrations/sql/20201110175414000001_relationtuple.mysql.down.sql, sql: DROP TABLE keto_namespace;: invalid connection
                                        github.com/ory/x/popx.(*Migrator).isolatedTransaction
                                                /home/patrik/git/go/pkg/mod/github.com/ory/x@v0.0.389/popx/migrator.go:324
                                        github.com/ory/x/popx.(*Migrator).Down.func1
                                                /home/patrik/git/go/pkg/mod/github.com/ory/x@v0.0.389/popx/migrator.go:212
                                        github.com/ory/x/popx.(*Migrator).exec
                                                /home/patrik/git/go/pkg/mod/github.com/ory/x@v0.0.389/popx/migrator.go:559
                                        github.com/ory/x/popx.(*Migrator).Down
                                                /home/patrik/git/go/pkg/mod/github.com/ory/x@v0.0.389/popx/migrator.go:177
                                        github.com/ory/keto/cmd/migrate.BoxDown
                                                /home/patrik/git/keto/cmd/migrate/down.go:63
                                        github.com/ory/keto/cmd/migrate.newDownCmd.func1
                                                /home/patrik/git/keto/cmd/migrate/down.go:40
                                        github.com/spf13/cobra.(*Command).execute
                                                /home/patrik/git/go/pkg/mod/github.com/spf13/cobra@v1.4.0/command.go:856
                                        github.com/spf13/cobra.(*Command).ExecuteC
                                                /home/patrik/git/go/pkg/mod/github.com/spf13/cobra@v1.4.0/command.go:974
                                        github.com/spf13/cobra.(*Command).Execute
                                                /home/patrik/git/go/pkg/mod/github.com/spf13/cobra@v1.4.0/command.go:902
                                        github.com/spf13/cobra.(*Command).ExecuteContext
                                                /home/patrik/git/go/pkg/mod/github.com/spf13/cobra@v1.4.0/command.go:895
                                        github.com/ory/x/cmdx.ExecBackgroundCtx.func1
                                                /home/patrik/git/go/pkg/mod/github.com/ory/x@v0.0.389/cmdx/helper.go:143
                                        golang.org/x/sync/errgroup.(*Group).Go.func1
                                                /home/patrik/git/go/pkg/mod/golang.org/x/sync@v0.0.0-20210220032951-036812b2e83c/errgroup/errgroup.go:57
                                        runtime.goexit
                                                /usr/lib/go/src/runtime/asm_amd64.s:1571
    dsn_testutils.go:94: could not drop database "testdb_e5015d8a6ad5870a1e932f45b0d670769c3eaef9" in "mysql://root:secret@(localhost:49236)/mysql?parseTime=true&multiStatements=true": dial tcp [::1]:49236: connect: connection refused
    dsn_testutils.go:94: could not drop database "testdb_e5015d8a6ad5870a1e932f45b0d670769c3eaef9" in "postgres://postgres:secret@127.0.0.1:49237/postgres?sslmode=disable": unexpected EOF
[mysql] 2022/05/27 13:23:32 packets.go:123: closing bad idle connection: EOF
FAIL
FAIL    github.com/ory/keto/cmd/migrate 38.709s
FAIL