Add CentOS Stream 9 container to CI matrix#12955

MichaelSimons merged 1 commit intodotnet:release/6.0.1xxdotnet/installer:release/6.0.1xxfrom

omajid:6.0.1xx-source-build-add-cento-stream-9omajid/dotnet-installer:6.0.1xx-source-build-add-cento-stream-9Copy head branch name to clipboard