Make DeflateStream write out headers and footers on empty streams.#118570

rzikm wants to merge 6 commits intodotnet:maindotnet/runtime:mainfrom

rzikm:66449-GZipStream-doesnt-write-anything-to-the-target-stream-when-there-was-no-write-operationrzikm/dotnet-runtime:66449-GZipStream-doesnt-write-anything-to-the-target-stream-when-there-was-no-write-operationCopy head branch name to clipboard