feat: Rework agent structure - solve foundry leaks - interop with foundry

[marktayl1]

Purpose

• ...
  This does several things:

1. Stops agent leaks in foundry
2. Allows agents to truly inherit from AzureAIAgent
3. Allows interoperation with Foundry low code experience

Does this introduce a breaking change?

• Yes
• [x ] No

How to Test

• Get the code

Clear foundry portal of old agents (I can share a script if helpful)
git clone [repo-address]
cd [repo-name]
git checkout [branch-name]
run front and back end

containerize front and back end from branch
update to containers in test infra environment
test all aspects of the application

• Test the code

Change is core so needs a complete test pass for application.

What to Check

Verify that the following are valid

• ...
  All standard app tests should perform as usual
  Go to Foundry portal and check that only expected agents are created

Other Information

Requires review by at least Francia and Roopan

[github-actions]

🎉 This PR is included in version 1.4.0 🎉

The release is available on GitHub release

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