[Feature] Allow Different Azure Authentication Methods

[jmmshn]

Allow Different Azure Authentication Methods

Currently we only use DefaultAzureCredentials to auth.
There are some cases with custom auth rules where relying on the automatically resolving auth chain of DefaultAzureCredentials is too cumbersome and it would be nice to have the option to bypass it.
This PR allows us to directly import different Azure authentication mechansims and use them to authentication on Azure.

The changes here allows the user to just provide a string representation of the credential type for easy serialization, but does technically allow for arbitrary credential classes to be provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.91%. Comparing base (9589881) to head (5f8f988).
Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1020      +/-   ##
==========================================
+ Coverage   88.84%   88.91%   +0.06%     
==========================================
  Files          46       46              
  Lines        3990     3997       +7     
==========================================
+ Hits         3545     3554       +9     
+ Misses        445      443       -2     

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[rkingsbury]

Thank you @jmmshn !