[K8SPS-18] MySQL Operator with asynchronous replication - initial version

[spron-in]

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Tell us about the feature Create MySQL operator with regular asynchronous replication. PXC is great, but sync replication brings additional overhead and might not be required for an application. It might be just additional flag in existing PXC Operator that would disable Galera.

Which product(s) is this request for? MySQL, Operators

Tell us about the problem Remove PXC overhead and run regular MySQL async replication

Describe alternatives you've considered Other operators

Additional context Anything else that you think might be useful

[bratao]

This would also enable the usage of Myrocks! For some scenarios, this would be awesome!