[main] Update dependencies from dotnet/icu dotnet/xharness dotnet/emsdk dotnet/msquic#81827

lewing merged 6 commits into

maindotnet/runtime:mainfrom

darc-main-1b915362-ebe4-4625-ba68-44dbbe5449c3dotnet/runtime:darc-main-1b915362-ebe4-4625-ba68-44dbbe5449c3Copy head branch name to clipboard