feat(cassandra): Support ssl auth with cassandra

[gabe-lyons]

Adds 3 new config options to cassandra

1. ssl_ca_certs - optional, for validating server validity
2. ssl_certfile - optional, for validating client validity
3. ssl_keyfile - optional, for validating client validity

Tested with a Cassandra image running locally. Cases tested: username password required/not required & SSL enabled and disabled. Also added unit tests.

My recipe:

source:
  type: "cassandra"
  config:
    # Basic connection configuration
    contact_point: "localhost"
    port: <port>

    username: "<username>"
    password: "<password>"

    ssl_ca_certs: "./ca.pem"
    ssl_certfile: "./client.pem"
    ssl_keyfile: "./client.key"

[codecov]

Codecov Report

Attention: Patch coverage is 91.66667% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...atahub/ingestion/source/cassandra/cassandra_api.py	88.88%	1 Missing ⚠️

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