Change history time to be equal to the middle of the time bounds

[slevis-lmwg]

Description of changes

This PR subsets the scope of issue #1059 and PR #2445 as a result of the October 2024 conversation in #2445.
This PR changes history time to be equal to the middle of the time bounds.
This PR does not put instantaneous fields on their own separate history files.

I will also bring submodule changes from ESCOMP/MOSART#106 (was ESCOMP/MOSART#69) and ESCOMP/RTM#39.

Specific notes

Contributors other than yourself, if any:

Are answers expected to change (and if so in what way)?
No.

Does this create a need to change or add documentation? Did you do so?
Maybe. No.

Testing performed, if any:
Plan to run aux_clm, mosart, rtm test-suites.

[slevis-lmwg]

I submitted this manual test to confirm that the committed modifications work as intended:
./create_test SMS_Lm1.f10_f10_mg37.I1850Clm60BgcCropCmip6waccm.derecho_gnu.clm-basic -c /glade/campaign/cgd/tss/ctsm_baselines/ctsm5.3.009
Check on Friday.

[slevis-lmwg]

The previous test completed its 1 month and the monthly output looked good, but there were annual history files that I could not tell. So I started another test (default is Ly1, but I changed to Ly2) and I added hist_avgflag_pertape(6) = 'I' to see what happens:
SMS_Ly2_Mmpi-serial.1x1_brazil.IHistClm60BgcQianRs.derecho_intel.clm-output_bgc_highfreq

PASS

[slevis-lmwg]

I updated the submodules to point to ESCOMP/MOSART#106 and ESCOMP/RTM#39 and submitted the three corresponding test-suites:

OK ./run_sys_tests -s rtm -c rtm1_0_80-ctsm5.2.029 --skip-generate
FAIL ./run_sys_tests -s mosart -c mosart1.1.02-ctsm5.2.029 --skip-generate
FAIL ./run_sys_tests -s aux_clm -c ctsm5.3.009 --skip-generate

All the rtm cases differ from the baseline BUT only the time variable.
All the mosart cases failed to build.
Some of the ctsm cases failed to build.
I will investigate on Monday...