Remove SkVM from debug-trace class names.

Debug traces are now supported in SkRP, and SkVM is likely going
away soon.

Change-Id: I68f18e863f94b285e3d48dab3e75c0902c6a60da
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/669357
Reviewed-by: Nicolette Prevost <nicolettep@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
11 files changed