RHOAIENG-25226: don't build images if we are only changing manifests (#1124)

Author: jiridanek

.github/workflows/build-notebooks-pr-rhel.yaml

@@ -2,6 +2,12 @@
 "name": "Build Notebooks (pr, RHEL images)"
 "on":
   "pull_request_target":
+    "paths-ignore":
+      # Don't build images if the only thing that changed is image digests in manifests
+      - manifests/base/params-latest.env
+      - manifests/base/params.env
+      # In fact, skip the build if there are only changes in manifests and nowhere else
+      - manifests/**
 
 # BEWARE: This GitHub Actions workflow runs on pull_request_target, meaning it has access to our secrets
 # see https://docs.github.com/en/actions/security-guides/security-hardening-for-github-actions#using-secrets

.github/workflows/build-notebooks-pr.yaml

@@ -2,6 +2,12 @@
 "name": "Build Notebooks (pr)"
 "on":
   "pull_request":
+    "paths-ignore":
+      # Don't build images if the only thing that changed is image digests in manifests
+      - manifests/base/params-latest.env
+      - manifests/base/params.env
+      # In fact, skip the build if there are only changes in manifests and nowhere else
+      - manifests/**
 
 permissions:
   contents: read

.github/workflows/build-notebooks-push.yaml

@@ -2,6 +2,12 @@
 "name": "Build Notebooks (push)"
 "on":
   "push":
+    "paths-ignore":
+      # Don't build images if the only thing that changed is image digests in manifests
+      - manifests/base/params-latest.env
+      - manifests/base/params.env
+      # In fact, skip the build if there are only changes in manifests and nowhere else
+      - manifests/**
   "workflow_dispatch":
   "schedule":
     - "cron": "0 2 * * *"