Cosmos: Support composite, hash and range indexes

[AndriySvyryd]

https://docs.microsoft.com/en-us/azure/cosmos-db/index-types

Also see API in #11336 (comment)

[jonmorgs]

I might be able to work on this if it's still relevant?

[AndriySvyryd]

Sure, also consider adding API to configure the IndexingMode for a container.

[christiannagel]

OrderBy/ThenBy needs a composite index with Cosmos. It would be great to have composite index added.