Resolves CI slowdown issues caused by limited availability of Windows containers with 8 cores by switching to the standard Windows runner image.
## Changes Made
- Updated `rust-cross` job to use `windows-latest` instead of `windows-latest-8-cores`
- Updated `windows-integration` job to use `windows-latest` instead of `windows-latest-8-cores`
- Updated `global-install` job matrix to use `windows-latest` instead of `windows-latest-8-cores`
This change trades some performance for better availability and faster CI queue times, as the standard Windows runners have much better availability than the 8-core variant.
Fixes#741