WIP: rm before merge

Author: Anton-Latukha

.github/workflows/caching.yml

@@ -30,6 +30,9 @@ on:
   push:
     branches:
       - master
+  pull_request:
+    branches:
+      - '**'
   schedule:
     # Refresh snapshot every day at 08:25 UTC (~00:25 in California)
     # Why: GitHub repo has 10G pool & on overflow GitHub removes caches in FIFO manner.