Client support for java regex based subscription

When using subscribe with a java regex (Pattern), we need to resolve it on the client side to send the broker a list of topic names to subscribe to.

Context:

The new consumer group protocol uses Google RE2/J for regular expressions and introduces new methods in the consumer API to subscribe using a `SubscribePattern`. The subscribe using a java `Pattern` will be still supported for a while but eventually removed.

• When the subscribe with SubscriptionPattern is used, the client should just send the regex to the broker and it will be resolved on the server side.
• In the case of the subscribe with Pattern, the regex should be resolved on the client side.

As part of this task, we should re-enable all integration tests defined in the PlainTextAsyncConsumer that relate to subscription with pattern and that are currently disabled for the new consumer + new protocol