The current match logic doesn't handle test for push events related to
stable release (example openwrt-22.03) but only fork with the related
prefix (example openwrt-22.03-fixup)
Fix wrong matching and while at it also add extra checks to other
matching (check if the branch name actually start with the requested
prefix)
Fixes: abe8a48242 ("CI: build: add support for per branch tools container")
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
65c3d19c4b