Add Azure TTS

[samnang]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.79%. Comparing base (562a5fa) to head (ead2bdd).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #1666   +/-   ##
========================================
  Coverage    98.78%   98.79%           
========================================
  Files          183      184    +1     
  Lines         3138     3141    +3     
========================================
+ Hits          3100     3103    +3     
  Misses          38       38           

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