[Improvement] clarify docker test failure messages

### What would you like to be improved?

Since the default value of `skipDockerTests` is `true`.
When user runs the docker tests task without setting `skipDockerTests=false`, the test will be failed but the error message is confused:

> * What went wrong:
> Execution failed for task ':integration-test:test'.
> > No tests found for given includes: [org.apache.gravitino.integration.test.client.AuditIT](--tests filter)

note: use `./gradlew :integration-test:test --tests "org.apache.gravitino.integration.test.client.AuditIT"` to reproduce

### How should we improve?

We should add configuration modification instructions in the error message to help users locate the cause of the error more easily.