Merge branch 'jgfouca/update_cime_subm_2024_08_26' (PR #6565)

... to 52787427846eec58038ab59664fd9c2706f23513 (which is
jgfouca/e3sm_cime, not latest master, due to a couple things that
needed to be reverted off CIME master).

From cime6.0.248

Changes:
1) Generalize _hists_match for mom6 files
2) support append in config_pes.xml overrides field
3) Add case git: Adds a case interface to git.
   It creates a local git repository when case.setup is
   run and updates that repository with each action that triggers an
   update of the CaseStatus file. Optionally a remote repository can be
   attached by setting CASE_GIT_REPOSITORY to the name of the remote
   repository. DISABLED FOR NOW
4) xmlchange: Add documentation for setting values with commas
5) Remove mct for cesm
6) remove load_balancing_tool, broken and unsupported

Fixes:
1) cprnc: need to make sure the directory exists before linking to it
2) check_lockedfiles call in xmlchange needs quiet=True
3) fixes detection of pfunit_path by making sure it exists
4) Fixes handling cprnc output
5) Fixes creating new environment with specific python version
6) Fixes query_config tool.
  - Adds longname to --grids
  - Fixes duplicate and empty choices
7) Fixes check_lockedfiles call in xmlchange
8) Fix list_e3sm_tests tool

[BFB]