[feature][cpp] Expose Chunking configuration C API

[RobertIndie]

Motivation

Expose Chunking configuration C API

Modifications

• Expose chunking_enabled, max_pending_chunked_message , auto_ack_oldest_chunked_message_on_queue_full to C API.
• Add unit tests for C API of producer configuration and consumer configuration.

Documentation

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[shibd]

/LGTM

[BewareMyPower]

It's better not to use C++ specific semantics in tests for C API. The C interfaces use int as a boolean value so we'd better use 1 and 0 to represent true and false.