add support for new ccs_config structure - backward compatible

[jedwards4b]

This allows the machine specific part of config_batch.xml to be split into an individual machine directory. It is a backward compatible change.

Test suite: scripts_regression_tests.py Test baseline: Test namelist changes: Test status: bit for bit

Fixes [CIME Github issue #]

User interface changes?:

Update gh-pages html (Y/N)?:

[jasonb5]

Once #4658 is merged it should fix this error.

Looking for: ['python=3.9']

Could not solve for environment specs
The following packages are incompatible
├─ python 3.9**  is requested and can be installed;
└─ truststore is not installable because it requires
   └─ python >=3.10  but there are no viable options
      ├─ python [3.10.0|3.10.1|...|3.12.4] conflicts with any installable versions previously reported;
      └─ python 3.12.0rc3 would require
         └─ _python_rc, which does not exist (perhaps a missing channel).

[jedwards4b]

replaced by #4659