ci: standardize concurrency rules

Signed-off-by: Nathan Weinberg <nweinber@redhat.com>

Author: nathan-weinberg

.github/workflows/pre-commit.yml

@@ -6,7 +6,7 @@ on:
     branches: [main]
 
 concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
   cancel-in-progress: true
 
 jobs:

.github/workflows/redhat-distro-container.yml

@@ -13,6 +13,10 @@ on:
       - main
       - rhoai-v*
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 env:
   REGISTRY: quay.io
   # TODO: change the tag to whatever downstream needs

.github/workflows/semantic-pr.yml

@@ -9,7 +9,7 @@ on:
       - synchronize
 
 concurrency:
-  group: ${{ github.workflow }}-${{ github.event.pull_request.number }}
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
   cancel-in-progress: true
 
 permissions: