[release/6.0.1xx] Eliminate runtime portable build#14816

ayakael wants to merge 3 commits intodotnet:release/6.0.1xxdotnet/installer:release/6.0.1xxfrom

ayakael:backports/pr-14549-to-release/6.0.1xxayakael/installer:backports/pr-14549-to-release/6.0.1xxCopy head branch name to clipboard