Automatic update from web-platform-tests CSS shape() - fix arc interpolation Instead of treating arc size/sweep as non-interpolable, treat them as interpolable values that always default to 1, as per spec (and SVG). https://drafts.csswg.org/css-shapes-2/#interpolating-shape Fixed some of the existing WPTs as they were serializing defaults instead of omitting them. Bug: 384781868 Change-Id: I05b3d2be2aede8c3b2fe05944afe3c487f8419eb Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6179486 Commit-Queue: Noam Rosenthal <nrosenthal@chromium.org> Reviewed-by: Fredrik Söderquist <fs@opera.com> Cr-Commit-Position: refs/heads/main@{#1408632} -- wpt-commits: acfc9317de7fb5cb4abd281d6bc2ae72072ebe46 wpt-pr: 50176