Introduce Config Parameters to Control RPC Batch Requests

[Psykepro]

Closes #2307.

What does this PR do?

Changes

1. Control Over Batch Requests:
   • Introduce a new config parameter RPC.BatchRequestsEnabled, with a default value of false, which will allow enabling or disabling batch requests via HTTP.
   • Introduce a new config parameter RPC.BatchRequestsLimit, with a default value of 20, which will limit the number of requests that can be incorporated into each batch request. If this parameter is set to zero, there will be no limit on the number of requests in a batch.

   [RPC]
   # ....
   BatchRequestsEnabled = false
   BatchRequestsLimit = 20
   # ...

Reviewers

Main reviewers:

• @tclemos
• @ToniRamirezM

[tclemos]

I've extended the jsonrpc/client to be able to do BatchCalls and added tests to check the new validations.

I've also refactored the code, reviewing the way we were returning the errors and how we were logging it, to avoid false positive errors and have better metrics between invalid requests and requests with errors.