[graphite] Guard clip/draw intersections with precision check

Adds a GM that first draw incorrectly in Graphite, and then triggered
an assert after https://skia-review.googlesource.com/c/skia/+/1023316.

This is based on a situation guarded in chrome from https://g-issues.chromium.org/issues/40057979

Bug: b/424508534
Change-Id: I2331cf9ca87a1cc66a56806002f0d7d678725a98
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/1023898
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
2 files changed