Improve batch request support

[Ndiritu]

• Support more than 20 batch request items using batch request content collections
• Expose a method to fetch failed steps when using BatchRequestContentCollection so users can retry those.
• Expose a method getResponsesStatusCodesAsync() to allow checking the status codes without creating a HttpResponseMessage for each step for both BatchRequestContent and BatchRequestContentCollection.

reference issues:

• Evaluate improving batching support msgraph-sdk-java-core#768
• Evaluate improving batch support msgraph-sdk-go-core#170
• Evaluate improving batching support msgraph-sdk-dotnet-core#612

[bwosborne2]

This issue ius closed. Does that mean it will not be implemented?

[Ndiritu]

@bwosborne2 it's still open. It will be implemented as a non-breaking change once we release a stable 2.0 in a few days.