chore: Fix failing OIDC workflows; cleanup unused actions (#4848)

Author: dougch

.github/workflows/bench.yml

@@ -10,6 +10,9 @@ on:
 jobs:
   bench:
     runs-on: ubuntu-latest
+    permissions:
+      contents: read  # This is required for actions/checkout
+      id-token: write # This is required for requesting the JWT
     steps:
       - uses: actions/checkout@v3
 

.github/workflows/gha_failure_monitor.yml

@@ -18,6 +18,7 @@ env:
 permissions:
   contents: write
   statuses: write
+  id-token: write # This is required for requesting the JWT/OIDC
 
 jobs:
   build-deploy: