Ingate: skip tests when not making source code changes

Ensure to skip paths not relevant to code change.

Signed-off-by: Arnaud Meukam <[email protected]>

Author: ameukam

config/jobs/kubernetes-sigs/ingate/ingate-presubmits.yaml

@@ -2,8 +2,9 @@ presubmits:
   kubernetes-sigs/ingate:
     - name: pull-ingate-boilerplate
       cluster: k8s-infra-prow-build
-      always_run: true
       decorate: true
+      optional: false
+      skip_if_only_changed: "^docs/|^\\.github/|\\.(md)$|^(README|LICENSE|OWNERS|OWNERS_ALIAS|SECURITY_CONTACTS)$|^(site|charts)/"
       decoration_config:
         timeout: 10m
       path_alias: sigs.k8s.io/ingate