Do not run primers tests on backporting branches

Author: Pierre-Sassoulas

.github/workflows/primer-test.yaml

@@ -4,14 +4,14 @@ on:
   push:
     branches:
       - main
-      - "maintenance/**"
   pull_request:
     paths:
       - "pylint/**"
       - "tests/primer/**"
       - "requirements*"
       - ".github/workflows/primer-test.yaml"
-
+    branches:
+      - main
 env:
   CACHE_VERSION: 1
   KEY_PREFIX: venv

.github/workflows/primer_run_pr.yaml

@@ -16,6 +16,8 @@ on:
       - "!.github/workflows/primer_run_main.yaml"
       - "!.github/workflows/primer_comment.yaml"
       - "!tests/primer/packages_to_prime.json"
+    branches:
+      - main
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}