Updates to Google AI: (#394)

- Changed GoogleAIStudio LLM code to match latest documentation
- Very minor tweak to vertexai LLM code - just matching what's in SDK docs
  no actual change to implementation.
- Tweaked VertexAI container build to speed up in dev
- Comments in LLM code to mention which docs it was built from.  Google
  SDKs are confusing ATM.

containers/Containerfile.vertexai

@@ -13,6 +13,7 @@ RUN dnf install -y python3.12 && \
   python -m ensurepip --upgrade && \
   pip3 install --no-cache-dir wheel aiohttp && \
   pip3 install --no-cache-dir pulsar-client==3.7.0 && \
+  pip3 install --no-cache-dir google-cloud-aiplatform && \
   dnf clean all
 
 # ----------------------------------------------------------------------------
@@ -48,5 +49,3 @@ RUN \
 
 WORKDIR /
 
-
-