Fix Windows vcpkg cache reuse

[adsharma]

Summary

• run the build workflow on pushes to main so Windows vcpkg binary caches are saved on a ref that release/tag builds can restore
• key the Windows vcpkg binary cache by the hosted runner's C:\vcpkg checkout commit instead of a stale Arrow version label
• add a broad Windows restore prefix so vcpkg can reuse compatible prior binary archives when the exact key is new

Root cause

The existing cache was saved from PR refs such as refs/pull/2/merge. Tag builds cannot restore those PR-scoped caches, so release builds start cold and rebuild Arrow through vcpkg.

Validation

• git diff --check
• parsed .github/workflows/build-and-deploy.yml with Ruby YAML.load_file