If the removal of a member namespace from the mesh fails, the namespace is added back to SMMR.status.configuredMembers.

This happens when the namespace has the maistra.io/member-of label, but is no longer listed in SMMR.spec.members, and an error such as 409 Conflict occurs when the operator tries to remove mesh resources from the namespace. The namespace gets added to configuredMembers even if it previously wasn't listed there.