chore(infra): disable tests on prior published packages on core release (#35368)

.github/workflows/_release.yml

@@ -396,6 +396,7 @@ jobs:
     runs-on: ubuntu-latest
     permissions:
       contents: read
+    if: false # temporarily skip
     strategy:
       matrix:
         partner: [anthropic]
@@ -541,7 +542,7 @@ jobs:
       - test-pypi-publish
       - pre-release-checks
       - test-dependents
-      - test-prior-published-packages-against-new-core
+      # - test-prior-published-packages-against-new-core
     # Run if all needed jobs succeeded or were skipped (test-dependents only runs for core/langchain_v1)
     if: ${{ !cancelled() && !failure() }}
     runs-on: ubuntu-latest