[release/6.0] Suppress SendPacketsElement_FileStreamMultiPartMixed_MultipleFileStreams_Success test on Windows 11#63526

safern merged 2 commits intorelease/6.0dotnet/runtime:release/6.0from

backport/pr-59203-to-release/6.0dotnet/runtime:backport/pr-59203-to-release/6.0Copy head branch name to clipboard