Send IncludeEmptyEntriesInMessagePayload capability to host to get empty entries in payload

For trigger payloads of collection type(ex: event hub trigger payload with batched messages), host will [skip empty entries ](https://github.com/Azure/azure-functions-host/issues/8499)by default. We [recently made a host level change](https://github.com/Azure/azure-functions-host/pull/8642) so that host will not skip empty entries if worker includes `IncludeEmptyEntriesInMessagePayload` capability when advertising the capability list to host. The [dotnet worker was updated to send this capability](https://github.com/Azure/azure-functions-dotnet-worker/pull/1091/) if user opts in for that(_In the next major version, we will enable it by default_). Python worker should consider making similar change.