redo multiinstance support

update esmFldsExchange_nems for ungridded wave fields; fix incorrect units in mediator files

        modified:   cesm/nuopc_cap_share/shr_expr_parser_mod.F90
        modified:   cesm/nuopc_cap_share/shr_megan_mod.F90

        modified:   cesm/nuopc_cap_share/shr_megan_mod.F90

        modified:   cesm/nuopc_cap_share/shr_megan_mod.F90

Updates to the MEGAN specifier string parser

enable asyncio using pio
### Description of changes 
Allows IO tasks to be independent of compute tasks in cesm

### Specific notes
(testing in progress)
Contributors other than yourself, if any:
Depends on share (ESCOMP/CESM_share#37) and cime (ESMCI/cime#4340).  

CMEPS Issues Fixed (include github issue #):

Are changes expected to change answers? (specify if bfb, different at roundoff, more substantial) 

Any User Interface Changes (namelist or namelist defaults changes)?

### Testing performed

Testing performed if application target is CESM:
- [ ] (recommended) CIME_DRIVER=nuopc scripts_regression_tests.py
   - machines:
   - details (e.g. failed tests):
- [ ] (recommended) CESM testlist_drv.xml
   - machines and compilers:
   - details (e.g. failed tests):
- [X] (optional) CESM prealpha test
   - machines and compilers cheyenne intel 
   - details (e.g. failed tests): results consistant with cesm2_3_alpha10d
- [ ] (other) please described in detail
   - machines and compilers
   - details (e.g. failed tests):

Testing performed if application target is UFS-coupled:
- [ ] (recommended) UFS-coupled testing
   - description:
   - details (e.g. failed tests):

Testing performed if application target is UFS-HAFS:
- [X] (recommended) UFS-HAFS testing
   - description:
   - details (e.g. failed tests):

### Hashes used for testing:

- [ ] CESM:
  - repository to check out: https://github.com/ESCOMP/CESM.git
  - branch/hash:
- [ ] UFS-coupled, then umbrella repostiory to check out and associated hash:
  - repository to check out:
  - branch/hash:
- [ ] UFS-HAFS, then umbrella repostiory to check out and associated hash:
  - repository to check out:
  - branch/hash:

fix the multi instance initialization

…port

changes needed for CDEPS PR ESCOMP#213

…e_clockinit

        new file:   cesm/nuopc_cap_share/shr_lightning_coupling_mod.F90
        modified:   cime_config/namelist_definition_drv_flds.xml
        modified:   mediator/esmFldsExchange_cesm_mod.F90
        modified:   mediator/fd_cesm.yaml

        modified:   cesm/nuopc_cap_share/shr_lightning_coupling_mod.F90
        modified:   cime_config/namelist_definition_drv_flds.xml

        modified:   cime_config/namelist_definition_drv_flds.xml
        modified:   mediator/esmFldsExchange_cesm_mod.F90
        modified:   mediator/fd_cesm.yaml

make xgrid default, handle main task for multidriver cases in esm_tim…

xgrid was causing restart problems; revert this until we can solve those
problems

Revert default aoflux_grid to ogrid

fieldNameList is not always allocated. We could wrap the deallocate in a
conditional, but since allocatable arrays are automatically deallocated
upon leaving a subroutine, this deallocate statement is unnecessary.

…ocate

Remove unnecessary deallocate

…thub.com/jedwards4b/CMEPS/compare/ff8726f..79d6fa7

	modified:   cime_config/config_component.xml

Update nvhpc compiler for GPU settings
Remove PGI compiler

	modified:   cime_config/config_component.xml

so that they could assign multiple values to the config_machines.xml
file

	modified:   cime_config/config_component.xml

…14.18_lightning_coupling

There was already a comment claiming nitrogen deposition was being passed, so
all I needed to add were the actual addfld_to(), addfld_from(), addmap_from(),
and addmrg_to() calls.

replace aux_cam with aux_cmeps in testlist

Send nitrogen deposition from atm to ocn

add CAM linked lbs to exe build

        modified:   cesm/nuopc_cap_share/shr_lightning_coupling_mod.F90

A fix for ESCOMP#346 so that LND2ROF_FMAPNAME will be used

fix issue with xgrid reproducibility

Cloud-to-ground lightning flash frequency coupling

…nt routine for ocn component

This reverts commit d4b8441.

…miscellaneous cleanup

minor fixes for ww3/cice coupling and update of code to cmeps0.14.24.

updates to remove mct_mod and all other mct related files from share/

…tialization time saver

turn off HierarchyProtocol

Improve diag salt format

removed unneeded xml variables

changes to bring cmeps up to date with changes in noresm

…than 24 hours

…ux_cpl_hist_daily

Because git told me to do it.
I'm trying to set up a remote to my new fork of CMEPS
in order to push changes on the aux_cpl_hist_daily branch.

… UFS

checking of nans in export field bundles