Add endpoint for listing all downtimes for the specified monitor

[api-clients-generation-pipeline]

See DataDog/datadog-api-spec#905

[codecov-io]

Codecov Report

Merging #282 (517cd1e) into master (eb49fe5) will decrease coverage by 0.22%.
The diff coverage is 7.69%.

@@            Coverage Diff             @@
##           master     #282      +/-   ##
==========================================
- Coverage   36.96%   36.73%   -0.23%     
==========================================
  Files         854      854              
  Lines       73295    74565    +1270     
==========================================
+ Hits        27095    27394     +299     
- Misses      46200    47171     +971     

Impacted Files	Coverage Δ
lib/datadog_api_client/v1/api/downtimes_api.rb	10.47% <7.69%> (-0.44%)	⬇️
...2/models/application_key_response_included_item.rb	57.14% <0.00%> (-1.40%)	⬇️
...g_api_client/v2/models/application_key_response.rb	58.94% <0.00%> (-1.27%)	⬇️
...tadog_api_client/v2/models/full_application_key.rb	56.43% <0.00%> (-1.15%)	⬇️
..._client/v2/models/application_key_relationships.rb	46.15% <0.00%> (-1.04%)	⬇️
...lient/v2/models/full_application_key_attributes.rb	53.57% <0.00%> (-0.98%)	⬇️
...b/datadog_api_client/v2/models/api_key_response.rb	44.21% <0.00%> (-0.96%)	⬇️
...og_api_client/v2/models/partial_application_key.rb	46.53% <0.00%> (-0.95%)	⬇️
...adog_api_client/v2/models/api_key_relationships.rb	42.55% <0.00%> (-0.93%)	⬇️
lib/datadog_api_client/v2/models/full_api_key.rb	45.54% <0.00%> (-0.93%)	⬇️
... and 620 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update eb49fe5...517cd1e. Read the comment docs.

[skarimo]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[codecov-commenter]

Codecov Report

❌ Patch coverage is 7.69231% with 24 lines in your changes missing coverage. Please review.
✅ Project coverage is 36.73%. Comparing base (eb49fe5) to head (517cd1e).
⚠️ Report is 1972 commits behind head on master.

Files with missing lines	Patch %	Lines
lib/datadog_api_client/v1/api/downtimes_api.rb	7.69%	24 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #282      +/-   ##
==========================================
- Coverage   36.96%   36.73%   -0.23%     
==========================================
  Files         854      854              
  Lines       73295    74565    +1270     
==========================================
+ Hits        27095    27394     +299     
- Misses      46200    47171     +971     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.