github actions: skip JIRA checks if secrets are unavailable

There are many workflows that are useful without the JIRA checks from
Forks.  We're still evaluating how to best deal with this without a lot
of engineer overhead to check extrenal contributors.

Author: PlaidCat

.github/workflows/validate-kernel-commits.yml

@@ -172,6 +172,14 @@ jobs:
           JIRA_URL: ${{ secrets.JIRA_URL }}
         working-directory: kernel-src-tree-tools
         run: |
+          # Check if JIRA credentials are set
+          if [ -z "$JIRA_API_TOKEN" ] || [ -z "$JIRA_API_USER" ] || [ -z "$JIRA_URL" ]; then
+            echo "⚠️ JIRA credentials not available (likely running from a fork) - skipping JIRA check"
+            echo "has_issues=false" >> $GITHUB_OUTPUT
+            echo "has_lts_mismatch=false" >> $GITHUB_OUTPUT
+            exit 0
+          fi
+
           # Run script and capture output, ensuring credentials are never echoed
           set +x  # Disable command echo to prevent credential exposure
           set +e  # Don't exit on error, we want to capture the output