[develop]: Document process for changing number of vertical levels

[gspetro-NOAA]

DESCRIPTION OF CHANGES:

This PR adds a section to the LAMGrid chapter explaining how to change the number of vertical levels in an SRW App experiment

Type of change

• This change requires a documentation update

TESTS CONDUCTED:

None required. This is a documentation-only PR. However, I ran through an experiment using the process in the docs to generate ak/bk for 128 levels. I used the resulting VCOORD_FILE to run the community.config.yaml experiment with 128 vertical levels instead of the usual 65. The workflow completed successfully and the results can be viewed on Hera here: /scratch2/NAGAPE/epic/Gillian.Petro/expt_dirs/test_vert2
The human-friendly version of the docs in my fork can be viewed here: https://srw-ug.readthedocs.io/en/text-grid/CustomizingTheWorkflow/LAMGrids.html.

• hera.intel
• orion.intel
• cheyenne.intel
• cheyenne.gnu
• gaea.intel
• jet.intel
• wcoss2.intel
• NOAA Cloud (indicate which platform)
• Jenkins
• fundamental test suite
• comprehensive tests (specify which if a subset was used)

DEPENDENCIES:

PR #880

DOCUMENTATION:

N/A (all docs)

ISSUE:

It seems that PR #813 and the updates in this PR at least partially resolve Issue #397.
I think there was the hope that we could simplify the process for users (e.g., by setting levp / npz and other required variables in config.yaml and generating the ak/bk automatically from that), so it may be best to check with @JeffBeck-NOAA and @gsketefian as to whether to close this issue and open an enhancement issue or just keep this issue open.

CHECKLIST

• My code follows the style guidelines in the Contributor's Guide
• I have performed a self-review of my own code using the Code Reviewer's Guide
• I have commented my code, particularly in hard-to-understand areas (N/A)
• My changes need updates to the documentation. I have made corresponding changes to the documentation
• My changes do not require updates to the documentation (explain).
• My changes generate no new warnings
• New and existing tests pass with my changes (N/A)
• Any dependent changes have been merged and published

[JeffBeck-NOAA]

Thanks for all your work on this PR, @gspetro-NOAA!

[MichaelLueken]

@gspetro-NOAA - Thank you very much for going into great detail on how to change the number of vertical levels in the SRW App! These changes look good to me! Approving now.