fix schema version in tests and delegate monitor metadata construction in tests

[eirsep]

unify single node tests verifying workflow behaviour into one single class
Tests verifying schema versions need to be updated as mappings for scheduled jobs and findings have been updated.
this PR is to fix schema version in tests for findings and scheduled jobs index mappings

Delegate monitor metadata verification fixed to assert the right metadata id.

[codecov]

Codecov Report

Merging #948 (5f4ce49) into main (89142f4) will decrease coverage by 1.34%.
The diff coverage is 66.12%.

@@             Coverage Diff              @@
##               main     #948      +/-   ##
============================================
- Coverage     76.07%   74.74%   -1.34%     
- Complexity      110      111       +1     
============================================
  Files           125      141      +16     
  Lines          7065     8263    +1198     
  Branches       1052     1206     +154     
============================================
+ Hits           5375     6176     +801     
- Misses         1153     1474     +321     
- Partials        537      613      +76     

Impacted Files	Coverage Δ
...org/opensearch/alerting/model/destination/Chime.kt	80.00% <ø> (ø)
...search/alerting/model/destination/CustomWebhook.kt	96.10% <ø> (ø)
...org/opensearch/alerting/model/destination/Slack.kt	80.00% <ø> (ø)
...rch/alerting/model/destination/email/EmailGroup.kt	90.12% <ø> (ø)
.../org/opensearch/alerting/util/AlertingException.kt	71.42% <ø> (+7.14%)	⬆️
.../opensearch/alerting/util/AnomalyDetectionUtils.kt	100.00% <ø> (ø)
...destinationmigration/DestinationConversionUtils.kt	71.11% <ø> (+1.11%)	⬆️
...g/core/resthandler/RestScheduledJobStatsHandler.kt	96.55% <ø> (ø)
...org/opensearch/alerting/model/WorkflowRunResult.kt	24.00% <24.00%> (ø)
...n/org/opensearch/alerting/model/MonitorMetadata.kt	43.33% <33.33%> (-0.99%)	⬇️
... and 27 more

... and 11 files with indirect coverage changes