stats: add tag extraction rule for embedded gRPC client streams_closed stats#44063

Retr0-XD wants to merge 1 commit intoenvoyproxy:mainenvoyproxy/envoy:mainfrom

Retr0-XD:fix/tag-extraction-rules-21595Retr0-XD/envoy:fix/tag-extraction-rules-21595Copy head branch name to clipboard