github actions: Skip JIRA checks for 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 +152,30 @@ jobs:
             exit 1
           fi
 
+      - name: Determine if JIRA PR check should run
+        id: should_check_jira
+        run: |
+          if [ "${{ github.event.pull_request.head.repo.full_name }}" = "${{ github.repository }}" ]; then
+            echo "result=true" >> $GITHUB_OUTPUT
+          else
+            echo "result=false" >> $GITHUB_OUTPUT
+          fi
+
       - name: Install JIRA PR Check dependencies
+        if: steps.should_check_jira.outputs.result == 'true'
         run: |
           python -m pip install --upgrade pip
           pip install jira
 
       - name: Mask JIRA credentials
+        if: steps.should_check_jira.outputs.result == 'true'
         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
+        if: steps.should_check_jira.outputs.result == 'true'
         id: jira_check
         continue-on-error: true  # Allow PR comments to be posted before failing workflow
         env:
@@ -213,7 +225,7 @@ jobs:
           exit $EXIT_CODE
 
       - name: Comment PR with JIRA issues
-        if: steps.jira_check.outputs.has_issues == 'true'
+        if: steps.should_check_jira.outputs.result == 'true' && steps.jira_check.outputs.has_issues == 'true'
         env:
           GH_TOKEN: ${{ github.token }}
         run: |
@@ -225,7 +237,7 @@ jobs:
           fi
 
       - name: Request changes if LTS mismatch
-        if: steps.jira_check.outputs.has_lts_mismatch == 'true'
+        if: steps.should_check_jira.outputs.result == 'true' && steps.jira_check.outputs.has_lts_mismatch == 'true'
         env:
           GH_TOKEN: ${{ github.token }}
         run: |
@@ -235,7 +247,7 @@ jobs:
             --repo "${{ github.repository }}"
 
       - name: Fail workflow if JIRA errors found
-        if: steps.jira_check.outcome == 'failure'
+        if: steps.should_check_jira.outputs.result == 'true' && steps.jira_check.outcome == 'failure'
         run: |
           echo "❌ JIRA PR check failed - errors were found in one or more commits"
           exit 1