Expose "event-v2 alert" monitor type

[api-clients-generation-pipeline]

See DataDog/datadog-api-spec#827

[codecov-io]

Codecov Report

Merging #216 (8cb18f2) into master (eaf38af) will decrease coverage by 0.88%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #216      +/-   ##
==========================================
- Coverage   35.87%   34.99%   -0.89%     
==========================================
  Files         819      819              
  Lines       70287    71487    +1200     
==========================================
- Hits        25215    25015     -200     
- Misses      45072    46472    +1400     

Impacted Files	Coverage Δ
lib/datadog_api_client/v1/api/monitors_api.rb	16.66% <ø> (ø)
lib/datadog_api_client/v1/models/monitor_type.rb	81.81% <100.00%> (+0.86%)	⬆️
...ib/datadog_api_client/v2/api/key_management_api.rb	8.69% <0.00%> (-63.59%)	⬇️
lib/datadog_api_client/v2/models/api_keys_type.rb	63.63% <0.00%> (-36.37%)	⬇️
...adog_api_client/v2/models/application_keys_type.rb	63.63% <0.00%> (-36.37%)	⬇️
...2/models/application_key_response_included_item.rb	26.19% <0.00%> (-32.35%)	⬇️
...g_api_client/v2/models/application_key_response.rb	28.42% <0.00%> (-17.82%)	⬇️
...b/datadog_api_client/v2/models/api_key_response.rb	28.42% <0.00%> (-16.75%)	⬇️
...og_api_client/v2/models/partial_application_key.rb	31.68% <0.00%> (-15.80%)	⬇️
.../datadog_api_client/v2/models/api_keys_response.rb	28.12% <0.00%> (-15.50%)	⬇️
... and 605 more

---

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 34.99%. Comparing base (eaf38af) to head (8cb18f2).
⚠️ Report is 2016 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #216      +/-   ##
==========================================
- Coverage   35.87%   34.99%   -0.89%     
==========================================
  Files         819      819              
  Lines       70287    71487    +1200     
==========================================
- Hits        25215    25015     -200     
- Misses      45072    46472    +1400     

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