Adding XFS as a root filesystem type

[AZaugg]

Merge Checklist

All boxes should be checked before merging the PR (just tick any boxes which don't apply to this PR)

• The toolchain has been rebuilt successfully (or no changes were made to it)
• The toolchain/worker package manifests are up-to-date
• Any updated packages successfully build (or no packages were changed)
• Packages depending on static components modified in this PR (Golang, *-static subpackages, etc.) have had their Release tag incremented.
• Package tests (%check section) have been verified with RUN_CHECK=y for existing SPEC files, or added to new SPEC files
• All package sources are available
• cgmanifest files are up-to-date and sorted (./cgmanifest.json, ./toolkit/scripts/toolchain/cgmanifest.json, .github/workflows/cgmanifest.json)
• LICENSE-MAP files are up-to-date (./SPECS/LICENSES-AND-NOTICES/data/licenses.json, ./SPECS/LICENSES-AND-NOTICES/LICENSES-MAP.md, ./SPECS/LICENSES-AND-NOTICES/LICENSE-EXCEPTIONS.PHOTON)
• All source files have up-to-date hashes in the *.signatures.json files
• sudo make go-tidy-all and sudo make go-test-coverage pass
• Documentation has been updated to match any changes to the build system
• Ready to merge

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Summary

Adding XFS support to the installer, as well as allow Mariner to boot XFS filesystems.

Change Log

• Added XFS option to Mariner Installer
• Added fsck.xfs to initrd
• Added XFS module to grub

Does this affect the toolchain?

YES

Test Methodology

• Build a new VHD and booted, confirmed root filesystem was running XFS

[AZaugg]

Not sure, if we want to add a default mount option of bigtime=1 for any XFS mount.

[dmcilvaney]

Looks good, just three things:

1. Looks like Vince sniped you with an update to the initramfs package, so needs a rebase
2. Could you add xfsprogs to the prerequisites doc
3. I don't believe we need these in the toolchain, since it will use the 'host' tools to partition the disks

[dmcilvaney]

Added @chalamalasetty who tracks the size of our ISOs as a reviewer.

@chalamalasetty - Looking at the dependencies for xfsprogs I think we already have them all in the image, so the only effect is xfsprogs itself. (4.27MB)

[dmcilvaney]

Added @chalamalasetty who tracks the size of our ISOs as a reviewer.

@chalamalasetty - Looking at the dependencies for xfsprogs I think we already have them all in the image, so the only effect is xfsprogs itself. (4.27MB)

Validated with a low memory device, seems fine still.