fix(topic): Detect illegal config change and force recreate.

[rojopolis]

Since I'm not aware of any other illegal config transitions I decided to just special case delete -> compact.

Addresses #134

[Mongey]

@rojopolis am I right in saying that this is only illegal on confluent-cloud, and, for non-ccloud brokers, it's ok to go from delete -> compact ? if that's the case, in order to support this, we should add a flag to the provider, to have users indicate that this behaviour is desired.

[rojopolis]

@rojopolis am I right in saying that this is only illegal on confluent-cloud, and, for non-ccloud brokers, it's ok to go from delete -> compact ? if that's the case, in order to support this, we should add a flag to the provider, to have users indicate that this behaviour is desired.

Unfortunately, I don't know :(

If so, a dry-run may be a better approach since it would leave it up to the server to decide whether a requested change requires a re-create.

I can see if I can implement that... I'm not sure I have the required Kafka knowledge.

[rojopolis]

Superseded by #136