fix(actions): make tech debt uploader not block CI and skip w/o creds (#26966)

Co-authored-by: John Bodley <4567245+john-bodley@users.noreply.github.com>

.github/workflows/tech-debt.yml

@@ -3,13 +3,27 @@ name: Upload Technical Debt Metrics to Google Sheets
 on:
   push:
     branches:
-      - main
       - master
 
 jobs:
-  process-and-upload:
-    runs-on: ubuntu-latest
+  config:
+    runs-on: "ubuntu-latest"
+    outputs:
+      has-secrets: ${{ steps.check.outputs.has-secrets }}
+    steps:
+      - name: "Check for secrets"
+        id: check
+        shell: bash
+        run: |
+          if [ -n "${{ (secrets.GSHEET_KEY != '' ) || '' }}" ]; then
+            echo "has-secrets=1" >> "$GITHUB_OUTPUT"
+          fi
 
+  process-and-upload:
+    needs: config
+    if: needs.config.outputs.has-secrets
+    runs-on: ubuntu-latest
+    name: Generate Reports
     steps:
       - name: Checkout Repository
         uses: actions/checkout@v4
@@ -28,4 +42,5 @@ jobs:
           SPREADSHEET_ID: '1oABNnzxJYzwUrHjr_c9wfYEq9dFL1ScVof9LlaAdxvo'
           SERVICE_ACCOUNT_KEY: ${{ secrets.GSHEET_KEY }}
         run: npm run lint-stats
+        continue-on-error: true
         working-directory: ./superset-frontend