TCN-667 add release action

[elliotmjackson]

cd "${BUFBUILD_BUF_SETUP_ACTION_DIR}"
git switch main
git pull origin main

make updateversion VERSION=${VERSION}
git diff

git checkout -b release/v${VERSION}
git commit -am "Update to v${VERSION}"
git push origin release/v${VERSION}

# Get that PR approved and merged

git switch main
git pull origin main
git tag -a "v${VERSION}" -m "v${VERSION}"
git push origin "v${VERSION}"

Resolves TCN-680
Resolves TCN-680

[elliotmjackson]

depends on TCN-671

[joshcarp]

LGTM with the assumption it's been tested on a branch