fix: remove dotnet from components to build

[binujp]

'dotnet9.0' fails to build due to version pinning. For azl4 we want partner teams to build and deliver dotnet. dotnet9.0 is not a buildrequires or runtime requires for any of the packages in the toml. We can get rid of it from the components to build list.

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

What does the PR accomplish, why was it needed?

Change Log

• Change
• Change
• Change

Does this affect the toolchain?

YES/NO

Associated issues

• #xxxx

Links to CVEs

• https://nvd.nist.gov/vuln/detail/CVE-YYYY-XXXX

Test Methodology

• Pipeline build id: xxxx

[Copilot]

Pull request overview

This PR removes the dotnet9.0 component entry from the repository’s full components list so it is no longer included in the set of components built as part of the base build (aligning with the stated goal that partner teams build/deliver dotnet separately).

Changes:

• Removed the [components.'dotnet9.0'] entry from components-full.toml.

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