github actions: skip JIRA checks forks

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 external contributors.

Author: PlaidCat

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

@@ -152,18 +152,25 @@ jobs:
             exit 1
           fi
 
+      - name: Determine if JIRA PR check should run
+        id: should_check_jira
+        if: ${{ github.event.pull_request.head.repo.full_name == github.repository }}
+
       - name: Install JIRA PR Check dependencies
+        needs: should_check_jira
         run: |
           python -m pip install --upgrade pip
           pip install jira
 
       - name: Mask JIRA credentials
+        needs: should_check_jira
         run: |
           echo "::add-mask::${{ secrets.JIRA_API_TOKEN }}"
           echo "::add-mask::${{ secrets.JIRA_API_USER }}"
           echo "::add-mask::${{ secrets.JIRA_URL }}"
 
       - name: Run JIRA PR Check
+        needs: should_check_jira
         id: jira_check
         continue-on-error: true  # Allow PR comments to be posted before failing workflow
         env:
@@ -213,6 +220,7 @@ jobs:
           exit $EXIT_CODE
 
       - name: Comment PR with JIRA issues
+        needs: should_check_jira
         if: steps.jira_check.outputs.has_issues == 'true'
         env:
           GH_TOKEN: ${{ github.token }}
@@ -225,6 +233,7 @@ jobs:
           fi
 
       - name: Request changes if LTS mismatch
+        needs: should_check_jira
         if: steps.jira_check.outputs.has_lts_mismatch == 'true'
         env:
           GH_TOKEN: ${{ github.token }}
@@ -235,6 +244,7 @@ jobs:
             --repo "${{ github.repository }}"
 
       - name: Fail workflow if JIRA errors found
+        needs: should_check_jira
         if: steps.jira_check.outcome == 'failure'
         run: |
           echo "❌ JIRA PR check failed - errors were found in one or more commits"