Supports ssl certificate configs when create Kafka connection

[Xin Hao]

We already support creating a Kafka connection with SASL auth, but it seems that lost the support for SSL certificate configs.

https://github.com/confluentinc/librdkafka/blob/master/CONFIGURATION.md?plain=1#L63-L83

For me, the most important configs are:

ssl.certificate.pem
enable.ssl.certificate.verification
ssl.endpoint.identification.algorithm