Create 'skip' stage and 'skip' tree

There are patches that go through patchwork that the CKI pipeline ignores. Even though those patches are ignored, there are no metrics for them nor can developers find them easily through the data warehouse.

Setup a 'skip' stage to allow patches the CKI pipeline wishes to ignore to get funneled into the pipeline for tracking purposes. The output of the 'skip' stage is to run lint to test if a patch is mis-identified and then just return pass.

The end goal is to try and get every patch posted on the mailing list through patchwork and into the CKI pipeline.