Add support to capture endorse and commit subtimings in the fabric gateway peer connector

[davidkel]

Please share the technical limitation of Caliper that you encountered.

#1205 provides a base implementation of the connector without this support

Please detail your feature idea that could alleviate the limitation.

As the new thin client apis allows you to separate the calls between endorse and broadcast we can now capture subtimings of the endorsement round trip and the submit/commit roundtrip of a transaction

Please share some details about your use case if possible, and how the new feature would make Caliper a better performance benchmarking framework.

This should be a simple extension to the current connector to capture the information, see the 1.4 low level fabric connector to see how that currently does it and replicate it.

Please share any suggestions about the new feature's code/configuration API (using formatted YAML segments or pseudo-code).

No response