[PIP-158][improve][client] Split client TLS transport encryption from authentication

[nodece]

Fixes #15289

Motivation

The client supports TLS transport encryption and TLS authentication, this code so like:

PulsarClient client = PulsarClient.builder()
                .serviceUrl("pulsar+ssl://localhost:6651")
                .tlsTrustCertsFilePath("/path/to/cacert.pem")
                .authentication(AuthenticationTls.class.getName(), authParams)
                .build()

We are using AuthenticationTls to perform the TLS transport encryption and TLS authentication, this causes an issue that cannot use other authentication with TLS transport encryption, and also made our confusion if we use TLS transport encryption by setting authentication.

Documentation

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• doc-complete - [improve][doc] Improve TLS transport encryption and authentication #16924

[BewareMyPower]

I've done my review for all code changes and left two request changes, PTAL.

[Technoboy-]

LGTM