PG-1238 Remove redundant code checkout and add required permission (#377)

* PG-1238 Remove redundant code checkout

* PG-1238 Add required permission for Perf results

.github/workflows/postgresql-perf-results.yml

@@ -8,6 +8,7 @@ on:
 
 permissions:
   contents: read
+  pull-requests: write
 
 jobs:
   download:
@@ -38,12 +39,6 @@ jobs:
         run: |
           unzip pr_perf_results.zip
 
-      - name: Clone pg_tde repository
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
-        with:
-          path: 'src'
-          ref: ${{ github.event.workflow_run.head_branch }}
-
       - name: 'Create comment'
         run: |
           gh pr comment ${PR_NUMBER} -F ../pr_perf_results --edit-last || \