update file specs to match M21C

[gmao-rreichle]

This PR updates GEOSldas to the M21C file specs:

• Updates LONG_NAME attributes in the EnsGridComp to match those of M21C.
• Updates HISTORY template (GEOSldas_HIST.rc) with variable names (SHORT_NAME) used in M21C.
• Updates tile_bin2nc4.F90 to match M21C variable names and descriptions.

PARTIALLY COMPLETE:

• Land constants file. Variables not (yet) in ENSAVG GridComp, but should be ok when written from Catch GridComp.

NOT DONE:

• M21C output file name template.

---

For the M21C file specs, see M21C ADAS release GEOSadas-5.30.3-M21C-6 (latest as of 17-Dec-2024). Specifically, the file specs are encoded in:

GEOSgcm_App      tag: v1.9.6+R21C_v1.0.6
GEOSgcm_GridComp tag: v1.18.1+R21C_v1.0.4

Draft (!!!) M21C file specs doc: e5303_m21c_filespec_ctl_cycle.pdf

---

TESTING:

GEOSldas branch for testing: feature/rreichle/TEST_update_exports_to_M21C_filespecs

@gmao-rreichle confirmed 0-diff for data in LDAS tests after commit e1add91
(Note that the nc4 comparison must account for the variable name changes in the "lnd" output; I used
lnd_rename.txt for changing the new variable names back to the old ones for comparison with the baseline -- note the hardcoded input and output file names in lnd_rename.txt.)

The latest commit c9ec191 adds another layer of complexity and requires editing the HISTORY.rc files associated with the GLOBAL/model, GLOBAL/assim, and GLOBALCS/assim tests. Specifically, TSOIL[x]TILE needs to be replaced with TP[x] in these HISTORY.rc files.

@biljanaorescanin successfully tested all standard Intel test cases and DEBUGCONUS. Merging PR while AGG and GNU tests are proceeding under the assumption that these will be fine (because there are no build errors in CI and because GNU and AGG were tested by @gmao-rreichle after the penultimate commit).