chore(github): debug backport action (#2073)

Add debug logs to backport action

issue: none

.github/workflows/backport.yml

@@ -5,6 +5,14 @@ on:
     types: ["labeled", "closed"]
 
 jobs:
+  dump_contexts_to_log:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Dump GitHub context
+        env:
+          JSON_DOC: ${{ toJson(github.event.pull_request) }}
+        run: echo "$JSON_DOC"
+
   backport:
     name: Backport PR
     # Only run on merged PRs with the 'backport-to` label