Add obsoletes and provides to fix errors in shim-unsigned upgrade to shim

[christopherco]

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 (./LICENSES-AND-NOTICES/SPECS/data/licenses.json, ./LICENSES-AND-NOTICES/SPECS/LICENSES-MAP.md, ./LICENSES-AND-NOTICES/SPECS/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

Prior ARM64 images and installations historically used "shim-unsigned" v15.4 in order to boot without Secure Boot enforcing.
To ensure a seamless upgrade experience from the older unsigned shim to this new signed shim, include additional RPM dependency logic (Obsoletes on "shim-unsigned" so older installations with "shim-unsigned" installed will upgrade cleanly from the unsigned shim v15.4 to this new signed version of the shim v15.8+

Unlike dnf, our current tdnf does not gracefully handle Obsoletes properly.
When the user runs "tdnf install shim-unsigned". The proper
behavior with Obsoletes only in place is for this transaction to
complete with nothing to do, which is what dnf does. However tdnf still
attempts to perform the transaction, which yields undesired results.

As a workaround to tdnf's lack of correct support of Obsoletes, add an
additional Provides to the shim package to have it "provide" for
shim-unsigned as well.

This workaround can be removed when tdnf is updated with proper RPM
Obsoletes behavior.

Signed-off-by: Chris Co chrco@microsoft.com

Does this affect the toolchain?

NO

Associated issues

• https://microsoft.visualstudio.com/OS/_workitems/edit/55261776

Test Methodology

• Pipeline build id:
  • x64 - 684829
  • arm64 - 684830

[christopherco]

Updated Buddy Build:

• x64
• aarch64

shim and shim-unsigned upgrade tests pass