[lfmerge] Create and push tag for release builds of lfmerge-fdo
[lfmerge] Create and push tag for release builds of lfmerge-fdo

Change-Id: Ia77dd2addd4e9d8ced4a1b56f60da897adf6df07

sillsdev/ci-builder-scripts,sillsdev/ci-builder-scripts,sillsdev/ci-builder-scripts