verify: Use managed databases

[kyleconroy]

Once #3415 has landed, the verify command will change to use a managed database instead of a sqlc Cloud hosted database server. Verify will still require that you push your queries to sqlc Cloud.

Changing the default behavior

When run without any arguments, verify will ensure that the current queries work with the current database schema. Before, verify fetched the latest queries for your project, which is not always what you want to have happen.

Rename against to queries-from

While more of a mouthful, the against parameter is confusingly named. sqlc pulls queries from the given branch name to verify against the current schema. against makes is sound like the schema is being pulled instead. The --queries-from parameter makes the command read correctly in English

$ sqlc verify --queries-from main