Merge pull request #4478 from BerriAI/litellm_support_response_schema_param_vertex_ai_old

feat(vertex_httpx.py): support the 'response_schema' param for older vertex ai models

.circleci/config.yml

@@ -66,7 +66,7 @@ jobs:
             pip install "pydantic==2.7.1"
             pip install "diskcache==5.6.1"
             pip install "Pillow==10.3.0"
-            pip install "ijson==3.2.3"
+            pip install "jsonschema==4.22.0"
       - save_cache:
           paths:
             - ./venv
@@ -128,7 +128,7 @@ jobs:
             pip install jinja2
             pip install tokenizers
             pip install openai
-            pip install ijson
+            pip install jsonschema
       - run:
           name: Run tests
           command: |
@@ -183,7 +183,7 @@ jobs:
             pip install numpydoc
             pip install prisma            
             pip install fastapi            
-            pip install ijson            
+            pip install jsonschema   
             pip install "httpx==0.24.1"
             pip install "gunicorn==21.2.0"
             pip install "anyio==3.7.1"