fix: OpenAI decorators: Optional aiConnectionName param added

[manvkaur]

This pull request introduces support for specifying an ai_connection_name parameter across multiple methods and classes in the azure/functions/decorators module. This parameter allows users to configure AI service connectivity settings, providing flexibility for both Azure OpenAI and non-Azure OpenAI services. The changes also include updates to the corresponding test cases to validate the new functionality.

Enhancements to AI Service Configuration:

• Added ai_connection_name Parameter:
  • Introduced the optional ai_connection_name parameter in several methods (text_completion_input, assistant_post_input, embeddings_input, semantic_search_input, and embeddings_store_output) within azure/functions/decorators/function_app.py. This parameter enables users to specify configuration settings for AI service connectivity, with fallback options to environment variables for both Azure OpenAI and non-Azure OpenAI services. [1] [2] [3] [4] [5]
  • Updated the corresponding __init__ methods in azure/functions/decorators/openai.py to include the ai_connection_name parameter, ensuring it is properly stored and utilized in various AI-related operations. [1] [2] [3] [4] [5]

Test Coverage Updates:

• Enhanced Unit Tests:
  • Updated test cases in tests/decorators/test_openai.py to include scenarios validating the ai_connection_name parameter for various input types, ensuring the parameter is correctly passed and serialized. [1] [2] [3]

These changes improve the flexibility and configurability of AI service integrations in the Azure Functions decorators, while maintaining robust test coverage for the new functionality.