maint: Add dockerfile/runner/ubi-fips items to .gitignore

Add appropriate lines to the .gitignore to ignore the binary blobs
that are local-only for the building of Runner's Dockerfile in
ubi-fips.

Author: WarheadsSE

.gitignore

@@ -10,6 +10,8 @@ dockerfiles/**/checksums-*
 dockerfiles/runner/*/install-deps
 dockerfiles/runner/alpine/gitlab-runner-linux-*
 dockerfiles/runner/ubuntu/gitlab-runner_*.deb
+dockerfiles/runner/ubi-fips/gitlab-runner-linux-*
+dockerfiles/runner/ubi-fips/gitlab-runner_*.rpm
 dockerfiles/runner-helper/binaries/
 .DS_Store
 .idea/