vtkModuleWrapClientServer: use new CMP0053 behavior
The escaped '
characters are an error with older policy settings, so
require this to be new. ParaView requires 3.8 to consume anyways, so we
can assume the policy exists.
Fixes: #20279 (closed)
I think @cobo ran into this as well (it's been mentioned before, but I can't find the references right now)?
Cc: @bloring