Fix missing tools in logs

[afzalmushtaque]

Fix for LLMCallEvent failing to log "tools" passed to BaseOpenAIChatCompletionClient in autogen_ext.models.openai._openai_client.BaseOpenAIChatCompletionClient

This bug creates problems inspecting why a certain tool was selected/not selected by the LLM as the list of tools available to the LLM is not present in the logs

Why are these changes needed?

Added "tools" to the LLMCallEvent to log tools available to the LLM as these were being missed causing difficulties during debugging LLM tool calls.

Related issue number

Checks

• I've included any doc changes needed for https://microsoft.github.io/autogen/. See https://github.com/microsoft/autogen/blob/main/CONTRIBUTING.md to build and test documentation locally.
• I've added tests (if relevant) corresponding to the changes introduced in this PR.
• I've made sure all auto checks have passed.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.52%. Comparing base (9d29731) to head (d7acecf).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6532   +/-   ##
=======================================
  Coverage   79.52%   79.52%           
=======================================
  Files         225      225           
  Lines       16661    16661           
=======================================
  Hits        13249    13249           
  Misses       3412     3412           

Flag	Coverage Δ
unittests	79.52% <ø> (ø)

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