DBZ-8040: Custom Converter Support

[ryanvanhuuksloot]

Sister PR: debezium/debezium#5674

This PR in combination with a PR from Debezium Server supports the ability to do custom converters. Internally we have multiple custom converters and needed to build our own modules and hardcore our class names.

Now we can do the following: (operator spec)

      type: clientprovided
      config:
        class: com.shopify.cdc.transforms.ByteArrayHeaderConverter

Related Issue: https://issues.redhat.com/browse/DBZ-8040

[Naros]

LGTM, thanks @ryanvanhuuksloot !