Cluster metrics visualization

[richfuAWS]

Description of changes:
The backend portion of my intern project. Created new classes and coordinators so that data collection and deletion jobs begin upon startup of the alerting plugin.

CheckList:
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[AWSHurneyt]

Looks like your PR includes the commits that refactored the backwards compatibility tests to use OS 1.1 instead of ODFE. This development branch in the public repo is 1 commit behind the main branch. I created these PRs to sync them #517, #519.

[codecov-commenter]

Codecov Report

Merging #509 (5a2d1f5) into cluster-metrics-visualization-dev (3b8bfe7) will increase coverage by 0.50%.
The diff coverage is 84.48%.

❗ Current head 5a2d1f5 differs from pull request most recent head 6f5c6f1. Consider uploading reports for the commit 6f5c6f1 to get more accurate results

@@                           Coverage Diff                           @@
##             cluster-metrics-visualization-dev     #509      +/-   ##
=======================================================================
+ Coverage                                76.72%   77.23%   +0.50%     
- Complexity                                 176      179       +3     
=======================================================================
  Files                                      166      169       +3     
  Lines                                     8370     8658     +288     
  Branches                                  1232     1254      +22     
=======================================================================
+ Hits                                      6422     6687     +265     
- Misses                                    1343     1345       +2     
- Partials                                   605      626      +21     

Impacted Files	Coverage Δ
...nationmigration/DestinationMigrationCoordinator.kt	68.08% <ø> (+4.25%)	⬆️
.../alerting/util/ClusterMetricsVisualizationIndex.kt	63.63% <63.63%> (ø)
...g/opensearch/alerting/settings/AlertingSettings.kt	91.42% <77.55%> (-7.48%)	⬇️
...nsearch/alerting/util/ClusterMetricsCoordinator.kt	85.36% <85.36%> (ø)
...n/kotlin/org/opensearch/alerting/AlertingPlugin.kt	92.77% <85.71%> (-0.74%)	⬇️
...ensearch/alerting/model/ClusterMetricsDataPoint.kt	100.00% <100.00%> (ø)
...rg/opensearch/alerting/BucketLevelMonitorRunner.kt	76.15% <0.00%> (-0.77%)	⬇️
...ain/kotlin/org/opensearch/alerting/AlertService.kt	78.46% <0.00%> (+0.47%)	⬆️
...destinationmigration/DestinationConversionUtils.kt	71.11% <0.00%> (+1.11%)	⬆️
.../kotlin/org/opensearch/alerting/util/IndexUtils.kt	72.91% <0.00%> (+2.08%)	⬆️
... and 4 more

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[AWSHurneyt]

You'll want to extract your validation logic into a separate, helper file. That will help prevent the AlertingSettings file from becoming clogged with feature-specific validators.

[lezzago]

Currently merging in this PR to the dev branch as to not lose this work and we can come back to it if we want this in the production version of Alerting.