Don't ignore NeedsRunner tests in core.

From the mailing list:

"It looks like no tests in sdks/java/core will run if they need a runner (They'll use CrashingRunner instead), and if they are annotated with @Category(NeedsRunner.class), they will be excluded from the test rule."

https://lists.apache.org/thread.html/rf007142710814197448a31b84538a3f7d2ed7b746d36fb4efb88d8b7%40%3Cdev.beam.apache.org%3E

We should find a way to include the direct runner as a dependency so these tests can be run without additional setup.

Imported from Jira [BEAM-11785](https://issues.apache.org/jira/browse/BEAM-11785). Original Jira may contain additional context.
Reported by: ibzib.