Merge changes in the main branch to the 1.x branch.

[adityaj1107]

Issue Releasing Instructions

Description of changes: Merge all the changes which are present in the main branch to the 1.x branch which is needed to maintain the parity for the project.

CheckList:

• Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[codecov-commenter]

Codecov Report

Merging #133 (d5dbdd6) into 1.x (701af8d) will decrease coverage by 1.63%.
The diff coverage is 72.54%.

@@             Coverage Diff              @@
##                1.x     #133      +/-   ##
============================================
- Coverage     80.46%   78.82%   -1.64%     
+ Complexity      214      211       -3     
============================================
  Files           154      172      +18     
  Lines          5856     6948    +1092     
  Branches        706      903     +197     
============================================
+ Hits           4712     5477     +765     
- Misses          766      993     +227     
- Partials        378      478     +100     

Impacted Files	Coverage Δ
...in/org/opensearch/alerting/script/TriggerScript.kt	100.00% <ø> (ø)
...nsearch/alerting/script/TriggerExecutionContext.kt	43.75% <11.11%> (-46.25%)	⬇️
...lerting/transport/TransportExecuteMonitorAction.kt	71.11% <33.33%> (-0.99%)	⬇️
...ation/bucketselectorext/BucketSelectorExtFilter.kt	41.53% <41.53%> (ø)
...lin/org/opensearch/alerting/alerts/AlertIndices.kt	73.82% <50.00%> (+8.67%)	⬆️
...n/bucketselectorext/BucketSelectorExtAggregator.kt	51.38% <51.38%> (ø)
...egation/bucketselectorext/BucketSelectorIndices.kt	52.38% <52.38%> (ø)
...selectorext/BucketSelectorExtAggregationBuilder.kt	55.90% <55.90%> (ø)
...main/kotlin/org/opensearch/alerting/model/Alert.kt	82.47% <57.44%> (-7.21%)	⬇️
.../org/opensearch/alerting/model/TriggerRunResult.kt	68.75% <68.75%> (ø)
... and 53 more

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[adityaj1107]

@qreshi Are we okay merging all commits in a single commit with links to the PRs on the main branch? I will go ahead and merge this once I have your buy-in on this decision.

Update: Synced up offline with @lezzago. Merging this one in.