Run clone-heavy workflows on ubuntu-24.04 instead of ubuntu-slim

[Copilot]

Workflows that check out the repo with fetch-depth: 2 were running on ubuntu-slim, which is intended for sparse-checkout workloads. Switch these to ubuntu-24.04.

• Runner change (ubuntu-slim → ubuntu-24.04) for workflows performing a fetch-depth: 2 checkout:
  • .github/workflows/protected-files.yaml
  • .github/workflows/typespec-requirement.yaml
  • .github/workflows/arm-lease-validation.yaml
  • .github/workflows/arm-modeling-review.yaml
• No change to other ubuntu-slim workflows (all use sparse-checkout).
• No change to fetch-depth: 0 workflows (avocado-code, breaking-change-code, breaking-change-cross-version-code) — already on ubuntu-24.04.

jobs:
  job:
-   runs-on: ubuntu-slim
+   runs-on: ubuntu-24.04
    steps:
      - uses: actions/checkout@v6
        with:
          fetch-depth: 2

[github-actions]

Next Steps to Merge

Next steps that must be taken to merge this PR:

• ❌ The required check named Swagger BreakingChange has failed. To unblock this PR, follow the process at aka.ms/brch.
• ❌ The required check named Breaking Change(Cross-Version) has failed. To unblock this PR, follow the process at aka.ms/brch.

Comment generated by summarize-checks workflow run.