CI miscellaneous updates and adding CI Unit Tests

[TerrenceMcGuinness-NOAA]

Description

This PR has a few maintenance updates to the CI pipeline and adds a test directory with Unit Tests

Minor Maintenance updates:

• Fix for STALLED cases reviled from PR 2700 (just needed a lambda specifier)
• Fixed path to experiment directory in PR message (had dropped EXPDIR in path)
• Needed latin-1 decoder in reading log files for publishing

Added python Unit Tests for CI functionality:

• Installed Rocoto and wxfow in GitHub Runner for testing key CI utility codes
• Cashed the install of Rocoto in the GitHub Runners to greatly reduce stetup time for running the unit tests
• Unit Tests Python scripts added
  • test_rocostat.py: rocoto_statcount() rocoto_summary() rocoto_stalled()
  • test_setup.py: setup_expt() test_setup_xml()
  • test_create_experment: test_create_experiment()
  • Reporting mechanism in the Actions tab for Python Unit Testing results
  • Test case data for STALLED and RUNNING stored on S3 and pulled using wget during runtime of tests

• Bug fix (fixes something broken)
• Maintenance (new CI unit tests)

How has this been tested?

Unit Tests ran in GitHub Runner using .github/workflow/ci_uint_tests.yaml

test_create_experiment.py::test_create_experiment PASSED                 [ 12%]
test_rocotostat.py::test_rocoto_statcount PASSED                         [ 25%]
test_rocotostat.py::test_rocoto_summary PASSED                           [ 37%]
test_rocotostat.py::test_rocoto_done PASSED                              [ 50%]
test_rocotostat.py::test_rocoto_stalled PASSED                           [ 62%]
test_setup.py::test_setup_expt PASSED                                    [ 75%]
test_setup.py::test_setup_xml PASSED                                     [ 87%]
test_setup.py::test_setup_xml_fail_config_env_cornercase PASSED          [100%]

Change characteristics

• Is this a breaking change (a change in existing functionality)? NO
• Does this change require a documentation update? NO