feat(azure): check related with App Insights service

[puchy22]

Context

Add new check for Azure that are related with App Insights to ensure that at leat exists one in the subscription

Description

I create the new appinsight service and related check appinsights_ensure_is_configured with the unit testing for everything

License

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[sergargar]

Good job!!

[codecov]

Codecov Report

Attention: 7 lines in your changes are missing coverage. Please review.

Comparison is base (cc71249) 85.85% compared to head (471d676) 85.84%.

Files	Patch %	Lines
.../azure/services/appinsights/appinsights_service.py	72.00%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3395      +/-   ##
==========================================
- Coverage   85.85%   85.84%   -0.01%     
==========================================
  Files         586      589       +3     
  Lines       18893    18938      +45     
==========================================
+ Hits        16220    16258      +38     
- Misses       2673     2680       +7     

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