Python: AzureAI OpenAPI + Memory Search Samples

[giles17]

Motivation and Context

Added V2 samples for OpenAPI and Memory Search

Description

Contribution Checklist

• The code builds clean without any errors or warnings
• The PR follows the Contribution Guidelines
• All unit tests pass, and I have added new tests where possible
• Is this a breaking change? If yes, add "[BREAKING]" prefix to the title of the PR.

[Copilot]

Pull request overview

This PR adds two new Python sample files demonstrating Azure AI agent capabilities with OpenAPI tools and memory search functionality. Both samples follow the established patterns in the repository and provide clear, well-documented examples for developers.

Key changes:

• Added sample demonstrating Azure AI agent with OpenAPI tool integration for external API calls
• Added sample demonstrating Azure AI agent with memory search capabilities for context retention across sessions

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
python/samples/getting_started/agents/azure_ai/azure_ai_with_openapi.py	Demonstrates using AzureAIClient with OpenAPI specifications to call external APIs, using the countries.json resource to query country information
python/samples/getting_started/agents/azure_ai/azure_ai_with_memory_search.py	Demonstrates using AzureAIClient with memory search tool to maintain conversation context across sessions, including memory store creation and cleanup

[moonbox3]

We should add these new samples to the samples README.