[FEATURE]BWC tests for restart/rolling upgrade scenario

[heemin32]

Is your feature request related to a problem? I would like to have BWC (backward compatibility) tests for restart/rolling upgrade scenarios in ml-commons to detect any potential compatibility issues early in the process.

What solution would you like? Having BWC test for restart/rolling upgrade scenario

What alternatives have you considered? Identifying BWC-related errors through customer reports or errors from other plugins utilizing ml-commons.

Do you have any additional context? A BWC issue was previously reported when upgrading from versions 2.9 and 2.10 to a newer version. https://github.com/opensearch-project/ml-commons/issues/1838

The neural-search plugin has a BWC issue in the rolling upgrade scenario, where auto-redeployment is frequently failing. https://github.com/opensearch-project/neural-search/issues/1035