Backport 585 and 582 to 2.5

[engechas]

Description

Backports for
#585
#582

Check List

• New functionality includes testing.
  • All tests pass
• New functionality has been documented.
  • New functionality has javadoc added
• Commits are signed per the DCO using --signoff

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For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[codecov]

Codecov Report

Attention: Patch coverage is 59.09091% with 27 lines in your changes are missing coverage. Please review.

Project coverage is 73.47%. Comparing base (f8c6ca4) to head (adb6e61).

Files	Patch %	Lines
...n/org/opensearch/commons/alerting/model/Monitor.kt	25.00%	3 Missing and 3 partials ⚠️
...n/bucketselectorext/BucketSelectorExtAggregator.kt	0.00%	4 Missing ⚠️
.../commons/alerting/model/AggregationResultBucket.kt	0.00%	4 Missing ⚠️
...lin/org/opensearch/commons/alerting/model/Alert.kt	0.00%	3 Missing and 1 partial ⚠️
...search/commons/alerting/model/QueryLevelTrigger.kt	25.00%	3 Missing ⚠️
...arch/commons/alerting/model/ClusterMetricsInput.kt	77.77%	0 Missing and 2 partials ⚠️
...opensearch/commons/alerting/model/action/Action.kt	0.00%	1 Missing and 1 partial ⚠️
...g/opensearch/commons/alerting/model/DataSources.kt	0.00%	1 Missing ⚠️
...rch/commons/alerting/model/DocLevelMonitorInput.kt	50.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##                2.5     #613      +/-   ##
============================================
+ Coverage     73.02%   73.47%   +0.44%     
- Complexity      697      700       +3     
============================================
  Files           110      110              
  Lines          4612     4645      +33     
  Branches        609      611       +2     
============================================
+ Hits           3368     3413      +45     
+ Misses          990      975      -15     
- Partials        254      257       +3     

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