Allow not profiling a specific "troublesome" kernel

[ausellis0]

Is your feature request related to a problem? Please describe.
Some users have knowingly "troublesome" kernels that can trip up omniperf. It would be nice to temporarily avoid these kernels during profiling, essentially kernel filtering out rather than in certain kernels. This may partially work with -k regex's for omniperf profile but it seems all kernels are being profiled with and without -k (see #325 ).

Describe the solution you'd like
For excluding only kernel ABC, I'd like to do a exclude regex like -k "(?!^ABC$)" or something similar.