- clean `cherry-pick` of e609b1ca plus touch our YAML
- Update `HelixTestRunner` command on Windows
  - use `dotnet` to avoid x64 requirements when using Win11 ARM64
- also, get scheduled runs going for aspnetcore-helix-matrix
  - release/6.0 and release/7.0 builds have not run since move to dnceng-public/public

nit: Change `$(IsXYZQueue)` properties to ignore case
- removes one gotcha going forward