[CI] Trigger standard set of jobs when PR is added to merge queue (#222)

Author: aobolensk

.github/workflows/main.yml

@@ -3,6 +3,7 @@ name: Build application
 on:
   push:
   pull_request:
+  merge_group:
   schedule:
     - cron: '0 0,6,12,18 * * *'
   workflow_dispatch: