Update module file after Gaea-C5 OS upgrade

[DavidBurrows-NCO]

The EPIC SI team has reinstalled spack-stack-1.6.0 at the same location it existed before. This PR updates version numbers in modulefiles/gaea.lua:
stack-intel 2023.1.0 to 2023.2.0
stack-cray-mpich 8.1.25 to 8.1.28

Resolves #1071
Refs NOAA-EMC/global-workflow #3011

[WenMeng-NOAA]

@DavidBurrows-NCO Please open a new issue linking to this PR. Are you working at EMC, EPIC or another affiliate?

[DavidBurrows-NCO]

@WenMeng-NOAA I added the issue and global-workflow reference to the original PR comment. My main affiliation is EPIC, but this is work done alongside @aerorahul's global-workflow team.

[DavidBurrows-NCO]

@WenMeng-NOAA @aerorahul Since the ufs-wx-model (Ref #2448) is setting up the gaeac5 and gaeac6 convention, should I go ahead and set that up for upp and other global-workflow submodules, i.e., convert all current gaea references to gaeac5. Follow up PRs can handle the C6 build/runs.

[WenMeng-NOAA]

@WenMeng-NOAA @aerorahul Since the ufs-wx-model (Ref #2448) is setting up the gaeac5 and gaeac6 convention, should I go ahead and set that up for upp and other global-workflow submodules, i.e., convert all current gaea references to gaeac5. Follow up PRs can handle the C6 build/runs.

@DavidBurrows-NCO I would suggest adding modulefile updates for both Gaea C5 and C6 in UPP, so they will be propagate to UFSWM with the upp submodule upgrade.

[DavidBurrows-NCO]

@WenMeng-NOAA I have updated this PR to include building on C6 and differentiated detect machine and modulefiles between gaeac5 and gaeac6. I re-cloned and tested builds on both systems. Let me know your thoughts. Thanks.

[WenMeng-NOAA]

@DavidBurrows-NCO I don't have Gaea access. Currently, the UPP RTs don't include Gaea. As long as you have completed the UPP executable build testing, it is fine with me.

[WenMeng-NOAA]

The UPP RTs have been completed on WCOSS2 with no baseline changes.

[WenMeng-NOAA]

This PR is ready for merging.

[DavidBurrows-NCO]

Thanks for your help @WenMeng-NOAA