Drop mirror: introduce opt-in setting to skip destination dropping

[Amogh-Bharadwaj]

This PR introduces a flag for the input of drop mirror to not bother with trying to drop destination peer artifacts.

• Useful in cases where the target data store no longer exists, or if the user wishes for the cdc raw table to remain or has some dependencies on it

Open to renaming or rewiring the flag

[serprex]

Suggested change

	}
	} else {
	destinationOk = true
	}