Add river routing

[gmao-rreichle]

Related PRs:
GEOS-ESM/GEOSldas_GridComp#145 (merged)
GEOS-ESM/GEOSgcm_GridComp#1143 (merged)
GEOS-ESM/GEOSgcm_GridComp#1375 (merged)
GEOS-ESM/MAPL#4000 (merged and captured in MAPL v2.64.0)

[biljanaorescanin]

@zyj8881357 conflict on PR is still not resolved. Are we using new MAPL or not?

[gmao-rreichle]

@zyj8881357 conflict on PR is still not resolved. Are we using new MAPL or not?

I merged develop, which fixes this. See also #857

[biljanaorescanin]

All tests passed.

Interesting tidbit:
Initially, the globalcs test failed. It turned out I was running tests on discover31, but this test requires running the package on discover36. Since for that test we need MERRA2 meteorological forcing, which leads to a segmentation fault for this case.

[biljanaorescanin]

All tests pass if we use this branch + use GEOS_Util bug fix branch PR215 + GEOSgcm_GridComp PR1375

[gmao-rreichle]

All tests pass if we use this branch + use GEOS_Util bug fix branch PR215 + GEOSgcm_GridComp PR1375

Thanks, @biljanaorescanin. For clarification, I don't think that the GEOS_Util bug fix branch PR215 is necessary for successful GEOSldas simulations. The GEOS_Util bug fix only touches the remap_restarts test script, which is not used by GEOSldas. That is, we can merge this PR and GEOS-ESM/GEOSldas_GridComp#145 without needing a new GEOS_Util release. We can merge this PR to get the GEOSldas routing functionality and then later update the GEOSldas components.yaml file again once there's a new GEOS_Util release is available that includes GEOS_Util PR #215.