[MM-62409] Fix webapp coverage upload for master runs (#31320)

* Fix webapp coverage upload for master runs

* Only pass codecov token

* Update to trigger workflow

.github/workflows/webapp-ci-master.yml

@@ -8,3 +8,5 @@ on:
 jobs:
   master-ci:
     uses: ./.github/workflows/webapp-ci-template.yml
+    secrets:
+      CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}