OLTP spark query pipeline draft on DataSourceV2 spark3

[moderakh]

This PR adds the support for spark query DataSourceV2 pipeline

• see TestReadE2EMain for end to end integration demo file
• I have a separate PR for supporting spark filter translation to cosmos parametrized query: spark filter to cosmos db pushdown query #17789

TODO: we need to discuss on the following items who does what (to be done after this PR):

• translate spark query filter to cosmos query: for now this is very basic to make TestReadE2EMain work. I have a separate PR supporting filter translation: spark filter to cosmos db pushdown query #17789
• For now only one spark task will be created. We need to utilize feed-range api to create one spark task per feed-range.
• we need to cache comos-client, for now there is no caching hence not managing the lifetime of the cosmos-clients (memory leak)
• this PR brings in the JsonSupport.scala and some code in CosmosRowConverter from v2 OLTP spark connector for translating ObjectNode to spark InternalRow. This code requires rewrite. This is only brought in for sake of making the TestReadE2EMain work.

[tknandu]

I think we should discuss the format name - "cosmos.items" feels a little off to me.. can we go with the style we have in the unified Spark connector in Synapse

[moderakh]

let's discuss in the scrum.

[FabianMeiswinkel]

Thanks Mo!