get pr info from trigger pr

Signed-off-by: Alex Meijer <ameijer@kubecost.com>
(cherry picked from commit 4600ab56396b5b2f19dcf1de284bc7b091fe3194)

.github/workflows/build-test.yaml

@@ -45,11 +45,22 @@ jobs:
         name: Build
         run: |
           just build-local
+      - name: Dump context
+        uses: crazy-max/ghaction-dump-context@v2
+      - name: get-pr-info
+        shell: bash
+        env:
+          PR_NUM: ${{ github.event.number }}
+        run: |
+          echo $PR_NUM > pr_num.txt
       - name: Upload code coverage
         uses: actions/upload-artifact@v3
         with:
           name: oc-code-coverage
-          path: coverage.out
+          path: |
+           coverage.out
+           pr_num.txt
+      
 
   frontend:
     runs-on: ubuntu-latest