Modify CLA workflow permissions and cleanup (#2369)

Signed-off-by: 安正超 <anzhengchao@gmail.com>

.github/workflows/cla.yml

@@ -21,26 +21,16 @@ on:
     types: [created]
 
 permissions:
-  contents: read
+  contents: write
+  pull-requests: write
+  issues: write
+  checks: write
 
 jobs:
   cla:
     if: ${{ github.event_name != 'issue_comment' || github.event.issue.pull_request }}
     runs-on: ubuntu-latest
     steps:
-      - name: Create token for rustfs/rustfs
-        id: target-token
-        uses: actions/create-github-app-token@v3
-        with:
-          app-id: ${{ vars.CLA_BOT_APP_ID }}
-          private-key: ${{ secrets.CLA_BOT_APP_PRIVATE_KEY }}
-          owner: ${{ github.repository_owner }}
-          repositories: ${{ github.event.repository.name }}
-          permission-contents: read
-          permission-pull-requests: read
-          permission-issues: write
-          permission-checks: write
-
       - name: Create token for rustfs/cla
         id: registry-token
         uses: actions/create-github-app-token@v3