[feat] Add listenerName to client config

[roryschadler]

Fixes #214

Motivation

This library doesn't provide a way to pass a custom listener name to a Pulsar client, which is necessary if you have multiple advertised listeners and want to hit the non-default one: https://pulsar.apache.org/docs/next/concepts-multiple-advertised-listeners/

Modifications

After apache/pulsar-client-cpp#370, getListener and setListener are now exposed in the C API, and can be used by this library as well.

Verifying this change

• Make sure that the change passes the CI checks.

This change added tests and can be verified as follows:

• added listenerName to e2e tests where necessary (uses first advertisedListener by default)

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[shibd]

@roryschadler hi, I'm doing release v1.11.0, Do you want to include it in v1.11.0?

[roryschadler]

@shibd yes, that would be great! Thanks @merlimat for the quick review. It looks like all the checks are green (except for the ARM64 linux_glibc check, as of now, it's still running all are green). If you're good to go with it, I'd love to include it!