noresm_v5_cam6_3_123: Update noresm branch to cam_6_123

[gold2718]

Summary: Update noresm_develop branch to cam6_3_123

Contributors: gold2718

Reviewers: oyvindseland

Purpose of changes: Aid in the implementation of the new Oslo chemistry and aerosol package by bring in relevant changes from ESCOMP/CAM

Github PR URL: https://github.com/NorESMhub/CAM/pull/94

Changes made to build system: None

Changes made to the namelist: New defaults for (prototype) CAM7 and new options for Frierson gray radiation

Changes to the defaults for the boundary datasets: None

Substantial timing or memory changes: None

Almost all of these changes are changes made to ESCOMP/CAM between cam6_3_112 and cam6_3_123. Below is a list of the files that differ from cam6_3_123

• .gitignore
  • Ignore HEMCO source
• Externals.cfg
• Externals_CAM.cfg
  • NorESM externals including CAM-Nor-phys
• bld/config_files/definition.xml
• bld/configure
  • Changes for CAM-Nor-phys (NF compsts).
• bld/namelist_files/namelist_defaults_cam.xml
• bld/namelist_files/namelist_definition.xml
  • Addition of low-res compset data for testing
  • Conversion of input files to CDF5 format
• cime_config/config_component.xml
  • Configuration options for NF compsets
• cime_config/config_compsets.xml
  • Addition of NF compsets, remove incorrect science_support tags.
• cime_config/testdefs/testlist_cam.xml
  • NorESM-specific testlist including for NF compsets.

Tests:

• aux_cam: Every test had (expected) namelist and baseline changes but were otherwise fine

Issues addressed by this PR:

closes https://github.com/NorESMhub/CAM/issues/88

[oyvindseland]

I did not go through that long list of files, but mostly read through the comments. Given that it is almost entirely ESCOMP changes there is no reason why I should make any protests to the changes