We were previously using the Docker Compose file in the root directory
for manual testing _and_ the server API tests.
This splits them so we can e.g. add Yugabyte for easy manual testing.
In the future, this will also allow us to use ephemeral ports for API
test databases, while keeping the fixed ports for manual testing.
PR-URL: https://github.com/hasura/graphql-engine-mono/pull/7524
GitOrigin-RevId: 7244e296b0ed0ace9782b6f44f321933a9d9a49d
