Claire ice-shelf-dev more testing

[claireyung]

This PR starts from #189 and makes minor MOM6 changes for sensitivity testing

Based on the working MOM6 ice shelf branch https://github.com/ACCESS-NRI/MOM6/tree/dev/gfdl%403d479de%2Baccess%2Bisf

• Add small edit to comment out where latent heat flux gets added to icebergs ACCESS-NRI/MOM6@5cfd8ca

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🚀 The latest prerelease access-om3/pr246-1 at 54035c3 is here: #246 (comment) 🚀

[github-actions]

🚀 Attempted to deploy access-om3 Prerelease pr246-1 with commit 54035c3

🖥️ Gadi Deployment ✔️

Usage Instructions

access-om3, defined in spack.yaml, will be deployed to Gadi as:

• 2026.05.002 as a Release (when merged).
• pr246-1 as a Prerelease (during this PR).

This Prerelease is accessible on Gadi using:

module use /g/data/vk83/prerelease/modules
module load access-om3/pr246-1

When using the above modules, the binaries shall be on your $PATH.

For advanced users, this Prerelease is also accessible on Gadi via /g/data/vk83/prerelease/apps/spack/1.1/spack in the access-om3-pr246-1 environment.
Due to inode-saving measures, one will have to manually untar the environment metadata before environment activation with tar -xf .spack-env .spack-env.tar. It will require one to have write privileges.

Configuration Information

This Prerelease is deployed using:

• access-nri/spack on branch 1.1
• ACCESS-NRI/upstream-spack-packages version access/v1.1
• access-nri/access-spack-packages version 2026.06.000
• access-nri/spack-config version 2026.05.004

If the above was not what was expected, commit changes to config/versions.json in this PR, or propose changes to build-cds config/settings.json.