[FEATURE] Helper function for searching that utilises Point In Time

[Jakob3xD]

Is your feature request related to a problem?

OpenSearch _search is limited to max 10_000 docs per request. Users need to do pagination with scroll or point in time.

What solution would you like?

We could add a helper function to the opensearchutil lib that allows users to search for documents but without the limitation of search returning max 10_000 documents by using Point In Time and search_after.
Exact implementation could be discussed.

Are such helper function wanted inside the lib?

What alternatives have you considered?

None

Do you have any additional context?

None

[dblock]

+1, it would be great to have a way to paginate through records in all paginated APIs in some consistent way without having to maintain a counter or a scroll position