ci/hotfix: legacy workflow (#16720)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

.github/workflows/README.md

@@ -46,11 +46,11 @@
 
 ## Deployment
 
-| workflow file                            | action                                                                             |
-| ---------------------------------------- | ---------------------------------------------------------------------------------- |
-| .github/workflows/release-pypi.yml       | Publish a release to PyPI.                                                         |
-| .github/workflows/release-docker.yml     | Build Docker images from dockers/\*/Dockerfile and publish them on hub.docker.com. |
-| .github/workflows/legacy-checkpoints.yml | App on request generate legacy checkpoints and upload them to AWS S3.              |
+| workflow file                              | action                                                                             |
+| ------------------------------------------ | ---------------------------------------------------------------------------------- |
+| .github/workflows/release-pypi.yml         | Publish a release to PyPI.                                                         |
+| .github/workflows/release-docker.yml       | Build Docker images from dockers/\*/Dockerfile and publish them on hub.docker.com. |
+| .github/workflows/\_legacy-checkpoints.yml | App on request generate legacy checkpoints and upload them to AWS S3.              |
 
 ## Bots
 

.github/workflows/legacy-checkpoints.yml → .github/workflows/_legacy-checkpoints.yml

@@ -35,7 +35,6 @@ on:
         default: false
         required: false
         type: boolean
-    secrets: inherit
 
 defaults:
   run:

.github/workflows/ci-checkpoints.yml

@@ -0,0 +1,20 @@
+name: Validate legacy ckpts
+
+on:
+  push:
+    branches: [master, "release/*"]
+  pull_request:
+    branches: [master, "release/*"]
+    types: [opened, reopened, ready_for_review, synchronize]  # added `ready_for_review` since draft is skipped
+    paths:
+      - ".github/workflows/ci-checkpoints.yml"
+      - ".github/workflows/_legacy-checkpoints.yml.yml"
+
+jobs:
+
+  try-legacy-checkpoints:
+    uses: ./.github/workflows/_legacy-checkpoints.yml
+    with:
+      push_to_s3: false
+      create_pr: false
+    secrets: inherit

.github/workflows/release-pypi.yml

@@ -169,7 +169,7 @@ jobs:
 
   legacy-checkpoints:
     needs: [build-packages]
-    uses: ./.github/workflows/legacy-checkpoints.yml
+    uses: ./.github/workflows/_legacy-checkpoints.yml
     with:
       push_to_s3: ${{ startsWith(github.event.ref, 'refs/tags') || github.event_name == 'release' }}
       create_pr: ${{ startsWith(github.event.ref, 'refs/tags') || github.event_name == 'release' }}