Improvements for Search Azure AI

[MikeAlhayek]

This PR improves few key area of the Azure AI Search module:

1. Replaces primary constructors with standard constructors to be consistent with the rest of the code base.
2. Improved the field mapping by adding a new listener to allow the user to override mappings "if needed".
3. Centralized the logic for mapping fields into one place. The base logic is defined and is extensible.

[Piedone]

I can do a static code review but not much more if that would help?

[MikeAlhayek]

I am just doing some final testing and planning to merge it after. If you have suggestions, feel free to review.

[Piedone]

Let's do that. I skimmed through the code, but can't comment.