`azure-ai-agents` and `azure-ai-projects` HTTPClient integration with OpenAI library

[jpalvarezl]

Description

Compilation of punted tasks to improve integration with OpenAI official SDKS for azure-ai-agents and azure-ai-projects

• Remove manual URL mapping (depends on this Expose convenience method in HttpRequest that returns request URL as a java.net.URL openai/openai-java#660)
• Improve HttpResponse and HttpRequest body ingestion by avoiding reading the stream twice (Feat. Request: HttpRequest/HttpResponse convenience methods. openai/openai-java#664)
• Improve HttpRequest header mapping (Expose convenience method in HttpRequest that returns request URL as a java.net.URL openai/openai-java#660)
• Requests that are meant to timeout do not interrupt the Test Proxy continuing the recording of a response (See related PR OpenAI.HttpClient to Azure.HttpClient mapper for test instrumentation #47416)
• Map all OpenAI's timeout values to Azure.Core provide HttpClient request via Context. Related issue: [FEATURE REQ] azure-core-http-<netty/okhttp> support for more granular request/response timeouts. #47552