Add regular expression capability to SKQP unittest filter

Current behavior, as an example, is to run every test not matching ".+ES3"
but this is subject to change based on Brian Osman's input

Bug: skia:12796
Change-Id: Ib798a6a6e6323ae0cf349010fce3f5982f2038bf
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/498976
Reviewed-by: Derek Sollenberger <djsollen@google.com>
Commit-Queue: Nathaniel Nifong <nifong@google.com>
2 files changed