Fix Windows test failure for temurin signature verification and add e2e coverage

[Copilot]

Description:
On windows-latest, process.platform === 'win32' causes renameWinArchive() to run fs.renameSync on the mocked download path /tmp/jdk.tar.gz, which doesn't exist on disk — throwing ENOENT. Fix mocks util.renameWinArchive in the downloadTool test suite alongside the other already-mocked util functions. Also adds an e2e job exercising the full verify-signature: true flow for Temurin.

• __tests__/distributors/temurin-installer.test.ts — add spyRenameWinArchive mock in downloadToolbeforeEach to prevent fs.renameSync from touching the filesystem during the signature verification test
• .github/workflows/e2e-versions.yml — new setup-java-temurin-signature-verification job running verify-signature: true for Temurin 17 and 21 across macOS, Windows, and Linux

Related issue:
Check run 81923318772

Check list:

• Mark if documentation changes are required.
• Mark if tests were added or updated to cover the changes.