[FEATURE] Ml-commons plugin introducing a new optional field "config" in MLTooSpec

[jngz-es]

Is your feature request related to a problem?

Ml-commons is introducing a new field config in MLToolSpec as showed in the pr https://github.com/opensearch-project/ml-commons/pull/2977. With the change, we allow cx to configure some static parameters for tools that stay unchanged/persist during the tool execution. It will fix a couple of bugs mentioned in the pr.

What solution would you like?

The pr https://github.com/opensearch-project/ml-commons/pull/2977.

What alternatives have you considered?

N/A.

Do you have any additional context?

It's an optional field.