Point test-langchain-python to github.com/caseyclements/langchain.git::ci-on-local-atlas

Author: caseyclements

.evergreen/config.yml

@@ -142,8 +142,8 @@ buildvariants:
     display_name: Langchain RHEL Python
     expansions:
       DIR: langchain-python
-      REPO_NAME: langchain
-      CLONE_URL: https://github.com/langchain-ai/langchain.git
+      REPO_NAME: langchain  # TODO [PYTHON-4679] Merge change in this branch
+      CLONE_URL: -b ci-on-local-atlas --single-branch https://github.com/caseyclements/langchain.git
       DATABASE: langchain_test_db
     run_on:
       - rhel87-small
@@ -210,6 +210,4 @@ buildvariants:
     run_on:
       - rhel87-small
     tasks:
-      - name: test-autogen
-     - name: test-langchain-python
-
+      - name: test-autogen