- Armada will now run helm tests by default, and the charts must
disable tests if they choose. A helm test that does not exist
is still a happy-path resolution.
- Documentation and schema updates to signify new deault behavior.
- Preparing to deprecate `test_charts` in ChartGroup processing.
Change-Id: I8e51e33a5d9559b11c2b75e122ecfc97af084ca4