Add tolerance for repeating-gradient-hsl-and-oklch
Skia's Graphite backend has a slight difference between these two
gradients likely due to how modulo is handled under the hood.
https://luci-milo.appspot.com/ui/inv/build-8749191857238032337/test-results?q=virtual%2Fgpu-rasterization%2Fexternal%2Fwpt%2Fcss%2Fcss-images%2Fgradient%2Frepeating-gradient-hsl-and-oklch.html
Bug: b:338122792
Change-Id: Ia41cecdeac9c623c47b7bb1318e6e3072e559e33
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5503754
Auto-Submit: Kaylee Lubick kjlubick@chromium.org
Commit-Queue: Robert Phillips robertphillips@google.com
Reviewed-by: Robert Phillips robertphillips@google.com
Cr-Commit-Position: refs/heads/main@{#1294863}