chore(infra): temporarily skip tests of previous alpha versions on core release (#33312)

To accommodate breaking changes (e.g., removal of deprecated params like
`callback_manager`).

Will revert once we have updated releases of anthropic and openai.

.github/workflows/_release.yml

@@ -385,6 +385,7 @@ jobs:
   test-prior-published-packages-against-new-core:
     # Installs the new core with old partners: Installs the new unreleased core
     # alongside the previously published partner packages and runs integration tests
+    if: false # temporarily skip
     needs:
       - build
       - release-notes
@@ -475,7 +476,6 @@ jobs:
       - release-notes
       - test-pypi-publish
       - pre-release-checks
-      - test-prior-published-packages-against-new-core
     runs-on: ubuntu-latest
     permissions:
       # This permission is used for trusted publishing: