add FMS support library to new CASE_SUPPORT_LIBRARIES variable

[jedwards4b]

We want to move the hardcoding of support libraries out of cime build.py with this PR. I am using mom to demonstrate what the change requires, it is backward compatible.

[jedwards4b]

Updates path to cime/CIME/Tools, not related to the issue of the PR.

[alperaltuntas]

Running the aux_mom suite, I received `ERROR: No variable CASE_SUPPORT_LIBRARIES found in case'. My sandbox is based on beta06.

Finished SETUP for test SMS.TL319_t232.G1850MARBL_JRA.derecho_intel in 5.807936 seconds (FAIL). [COMPLETED 10 of 14]
Case dir: /glade/derecho/scratch/altuntas/cesm.tests/aux_mom/30beta06/SMS.TL319_t232.G1850MARBL_JRA.derecho_intel.C.20250828_094125_668qgj
Errors were:
Test 'SMS.TL319_t232.G1850MARBL_JRA.derecho_intel' failed in phase 'SETUP' with exception 'ERROR: Fatal error in case.cmpgen_namelists: 2025-08-28 09:41:36 atm
Create namelist for component datm
Calling /glade/work/altuntas/cesm.sandboxes/cesm3_0_beta06.sbx/components/cdeps/datm/cime_config/buildnml
2025-08-28 09:41:36 lnd
Create namelist for component slnd
Calling /glade/work/altuntas/cesm.sandboxes/cesm3_0_beta06.sbx/cime/CIME/non_py/src/components/stub_comps_nuopc/slnd/cime_config/buildnml
2025-08-28 09:41:36 ice
Create namelist for component cice
Calling /glade/work/altuntas/cesm.sandboxes/cesm3_0_beta06.sbx/components/cice//cime_config/buildnml
RUN: /glade/work/altuntas/cesm.sandboxes/cesm3_0_beta06.sbx/components/cice/bld/generate_cice_decomp.pl -ccsmroot /glade/work/altuntas/cesm.sandboxes/cesm3_0_beta06.sbx -res tx2_3v2 -nx 540 -ny 480 -nproc 128 -thrds 1 -output all
FROM: /glade/derecho/scratch/altuntas/cesm.tests/aux_mom/30beta06/SMS.TL319_t232.G1850MARBL_JRA.derecho_intel.C.20250828_094125_668qgj
output: 540 480 18 16 8 sectrobin square-ice

2025-08-28 09:41:36 ocn
Create namelist for component mom
Calling /glade/work/altuntas/cesm.sandboxes/cesm3_0_beta06.sbx/components/mom//cime_config/buildnml
ERROR: No variable CASE_SUPPORT_LIBRARIES found in case'
File "/glade/work/altuntas/cesm.sandboxes/cesm3_0_beta06.sbx/cime/CIME/test_scheduler.py", line 1126, in _run_catch_exceptions
return run(test)
File "/glade/work/altuntas/cesm.sandboxes/cesm3_0_beta06.sbx/cime/CIME/test_scheduler.py", line 1012, in _setup_phase
expect(
File "/glade/work/altuntas/cesm.sandboxes/cesm3_0_beta06.sbx/cime/CIME/utils.py", line 176, in expect
raise exc_type(msg)

[alperaltuntas]

@jedwards4b If CASE_SUPPORT_LIBRARIES will have been introduced in alpha07d (or already introduced since beta06), then maybe backwards compatibility isn't needed. Otherwise, we probably want something like a try except block around that.

[jedwards4b]

Yes, I've added the try except block and we will remove the backward compatibility once all components are updated in a tag. Thanks