Create Github Action for physics scheme tests

### What is the feature/what would you like to discuss?

Once issues #229, #230, and #233 have been resolved, then it would be helpful to create a Github Action that automatically ran the CIME tests of CCPP physics suites whenever someone opened or updated a Pull Request to either ESCOMP/CAM-SIMA or NCAR/atmospheric_physics.

This would likely require a container or cached build environment that included things like GNU-built NetCDF and ESMF libraries. It would also require a method to automatically acquire the snapshot files used for testing, which will likely depend on how large the files end-up being.

Also, given that these tests are relatively expensive (at least for a Github Action), they should only run after simpler unit and linting tests (e.g. the python unit tests) have all successfully run with no failures.

### Is there anyone in particular you want to be part of this conversation?

_No response_

### Will this change (regression test) answers?

No

### Will you be implementing this enhancement yourself?

Any Software Engineer can do this