refactor(utils): move is mount read only function to common lib (backport #143)

[mergify]

This is an automatic backport of pull request #143 done by Mergify.
Cherry-pick of 6e921c6 has failed:

On branch mergify/bp/v1.5.x/pr-143
Your branch is up to date with 'origin/v1.5.x'.

You are currently cherry-picking commit 6e921c6.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   pkg/server/share_manager.go
	new file:   vendor/github.com/longhorn/go-common-libs/utils/mount.go
	modified:   vendor/google.golang.org/grpc/internal/transport/transport.go
	modified:   vendor/google.golang.org/grpc/resolver/resolver.go

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	both modified:   go.mod
	both modified:   go.sum
	deleted by us:   vendor/github.com/longhorn/go-common-libs/io/file.go
	deleted by us:   vendor/github.com/longhorn/go-common-libs/types/file.go
	both modified:   vendor/google.golang.org/grpc/clientconn.go
	deleted by us:   vendor/google.golang.org/grpc/resolver_wrapper.go
	both modified:   vendor/google.golang.org/grpc/rpc_util.go
	both modified:   vendor/google.golang.org/grpc/server.go
	both modified:   vendor/google.golang.org/grpc/version.go
	both modified:   vendor/modules.txt

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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[mergify]

Cherry-pick of 6e921c6 has failed:

On branch mergify/bp/v1.5.x/pr-143
Your branch is up to date with 'origin/v1.5.x'.

You are currently cherry-picking commit 6e921c6.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   pkg/server/share_manager.go
	new file:   vendor/github.com/longhorn/go-common-libs/utils/mount.go
	modified:   vendor/google.golang.org/grpc/internal/transport/transport.go
	modified:   vendor/google.golang.org/grpc/resolver/resolver.go

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	both modified:   go.mod
	both modified:   go.sum
	deleted by us:   vendor/github.com/longhorn/go-common-libs/io/file.go
	deleted by us:   vendor/github.com/longhorn/go-common-libs/types/file.go
	both modified:   vendor/google.golang.org/grpc/clientconn.go
	deleted by us:   vendor/google.golang.org/grpc/resolver_wrapper.go
	both modified:   vendor/google.golang.org/grpc/rpc_util.go
	both modified:   vendor/google.golang.org/grpc/server.go
	both modified:   vendor/google.golang.org/grpc/version.go
	both modified:   vendor/modules.txt

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[ChanYiLin]

ref: longhorn/longhorn#8125