ci: remove tics debug branch from workflow trigger (#5609)

Author: ndv99

.github/workflows/coverage.yaml

@@ -1,8 +1,5 @@
 name: Test coverage and TiCS Report
 on:
-  push:
-    branches:
-      - ci-tics-main
   schedule:  # uses last commit on default branch (main)
     - cron: "30 0 * * 6" # At 0:30 on Saturday
   # temporarily disabling client mode due to quota