[FEATURE] Test cases should clean up the data it created

[rawwar]

Is your feature request related to a problem?
Currently, test cases are leaving indexes, model and other data behind in the OpenSearch instance it connects to. Also, if the index already exists, we are deleting them. I think this is fine if we are using new instance of OpenSearch just for the tests. But, when connecting to a instance that's not just for test cases, this is causing issues as its deleting indexes and leaving data behind.

What solution would you like?
Tests should handle the task of cleaning up the data. Also, creation of test data should follow a pattern that's unique and obscure in general use so that it doesn't cause issues.

What alternatives have you considered?
None

[dhrubo-os]

Sure!