Update marbl

[mnlevy1981]

Description of changes:

Update MARBL to use latest version (after marbl-ecosys/MARBL#423 is accepted / merged / tagged)

Testing:

Test case/suite: none yet; will run aux_pop and aux_pop_MARBL and comment on results below
Test status: [bit for bit, roundoff, climate changing]

Fixes [POP2 Github issue #] No tagged issues, though there are some MARBL-related issues that might be easy to fix that could be included

User interface (namelist or namelist defaults) changes? latest+4p2z is a new valid value for OCN_BGC_CONFIG

[mnlevy1981]

I still need to update Externals_POP.cfg once there is a MARBL tag.

Should we run 4p2z by default? I either need to add a 4p2z test to aux_pop_MARBL or make the default 4p2z and add a 3p1z test to aux_pop_MARBL depending on the answer to that question.

[mnlevy1981]

Testing results: I ran aux_pop_MARBL on cheyenne (with both intel and gnu). All tests fail NLCOMP due to additional variables that were added to marbl_in in recent MARBL updates (we are jumping from marbl0.40.3 to marbl0.43.0, so there's a lot to catch up on). Further, all tests are failing BASELINE because those recent MARBL commits also added some new diagnostics for FEISTY. There are two tests that are actually changing answers, and failing the BASELINE due to RMS differences detected by cprnc:

• ecosys_add_cocco: One of the MARBL changes is to cap picpoc at 1.0, which I believe only affects explicit calcifiers. Since the default 3p1z configuration has an implicit calcifier, the majority of tests do not run through that portion of the code. Coccolithophores are an explicit calcifier, though, so the 4p1z configuration in the add_cocco test does compute / use this picpoc term.
• ecosys_spectra_pfts: One of the MARBL changes was an update to how zoo_loss is routed; it was brought in as a recent update to SPECTRA. Not only does that specific code modification change answers, but I also provided a more recent SPECTRA-fied version of user_nl_marbl for this test to keep the test in line with how the code has most recently been run.