Copy 'Default.yml" to build directories

[grnydawn]

Default.yml is copied into two subdirectories under the Omega build directory:

The config subdirectory to support Polaris testing. The test subdirectory to support Omega ctests (renamed to omega.yml). Tested only on Chrysalis.

Checklist

• [ ] Documentation:
  • [ ] Design document has been generated and added to the docs
  • [ ] User's Guide has been updated
  • [ ] Developer's Guide has been updated
  • [ ] Documentation has been built locally and changes look as expected
• [X] Testing
  • [ ] A comment in the PR documents testing used to verify the changes including any tests that are added/modified/impacted.
  • [X] CTest unit tests for new features have been added per the approved design.
  • [ ] Polaris tests for new features have been added per the approved design (and included in a test suite)
  • [ ] Unit tests have passed. Please provide a relevant CDash build entry for verification.
  • [ ] Polaris test suite has passed
  • [ ] Performance related PRs: Please include a relevant PACE experiment link documenting performance before and after.
• [ ] Stealth Features
  • [ ] If any stealth features are included in the PR, please confirm that they have been documented.

closes #126

[xylar]

Maybe this PR should also update the documentation to remove these lines, now that they aren't needed: https://github.com/E3SM-Project/Omega/blob/develop/components/omega/doc/devGuide/QuickStart.md?plain=1#L152-L154

Should now just be:

Omega includes several unit tests that run through CTest. The unit tests need to be run on a compute node.

[xylar]

Also, maybe we can delete UnitTest.yml in this PR?

[grnydawn]

@xylar, I updated this PR by revising the documentation and removing UnitTests.yml. I have only tested this on Chrysalis, and all tests passed except for two tendency term tests, which seem unrelated to this PR.

[xylar]

Looks great! Thank you.