[Backport 2.5] Adding backwards compatibility test for ml-commons plugin

[opensearch-trigger-bot]

Backport e37ab93 from #681

[codecov-commenter]

Codecov Report

Merging #690 (e37ab93) into 2.5 (0aa08cf) will increase coverage by 0.70%.
The diff coverage is 25.00%.

❗ Current head e37ab93 differs from pull request most recent head b6593ce. Consider uploading reports for the commit b6593ce to get more accurate results

@@             Coverage Diff              @@
##                2.5     #690      +/-   ##
============================================
+ Coverage     83.42%   84.13%   +0.70%     
- Complexity      996     1010      +14     
============================================
  Files            93       93              
  Lines          3662     3662              
  Branches        343      343              
============================================
+ Hits           3055     3081      +26     
+ Misses          461      436      -25     
+ Partials        146      145       -1     

Flag	Coverage Δ
ml-commons	84.13% <25.00%> (+0.70%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...h/ml/action/upload/TransportUploadModelAction.java	98.63% <ø> (ø)
...ain/java/org/opensearch/ml/model/MLModelCache.java	86.36% <ø> (ø)
...n/java/org/opensearch/ml/model/MLModelManager.java	78.20% <0.00%> (ø)
.../java/org/opensearch/ml/task/MLTaskDispatcher.java	32.94% <0.00%> (ø)
.../org/opensearch/ml/settings/MLCommonsSettings.java	100.00% <100.00%> (ø)
.../ml/action/syncup/TransportSyncUpOnNodeAction.java	89.79% <0.00%> (+4.08%)	⬆️
...n/java/org/opensearch/ml/cluster/MLSyncUpCron.java	93.75% <0.00%> (+6.25%)	⬆️
...ain/java/org/opensearch/ml/task/MLTaskManager.java	65.98% <0.00%> (+6.59%)	⬆️
... and 1 more

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[ylwu-amzn]

DCO check failed ,

b6593ce63279457f9a4a737efa0f5656892c5b22    Can not find "Sicheng Song <[email protected]>", in ["Sicheng Song <[email protected]>", "Sicheng Song <[email protected]>", "Sicheng Song <[email protected]>", "Sicheng Song <[email protected]>", "Sicheng Song <[email protected]>", "Sicheng Song <[email protected]>", "Sicheng Song <[email protected]>"].

Sicheng published a new PR to manually backport #691