fixes Bug 1066120 - patches to transform system to get rules running again

he processor rewrite rules have been broken since the deploying to 101

it has to do with dependency on legacy processor - switch to rules from the HybridProcessor.
This docstring could use some updating. It's unclear to me what dumps, processed_crash, and processor are doing as unused positional args.

It's a very strange interface. I would expect `key` to be a positional as well, or at least to default to something other than the empty string.