Bug 1779107 [wpt PR 34736] - blink: Switch root svg elements to apply all overflow...

Bug 1779107 [wpt PR 34736] - blink: Switch root svg elements to apply all overflow properties., a=testonly

Automatic update from web-platform-tests
blink: Switch root svg elements to apply all overflow properties.

This change switches the outermost root svg element (other than svg
documents where the root svg element is also the document element) to
respect paint containment and overflow-clip-margin. This aligns svg with
the implementation for other replaced elements.

This also applies overflow correctly if it's different in both axis.
Prior to this change overflow was either visible in both directions
or clipped in both.

Bug: 1321217
Fixed: 364503
Change-Id: I9c49b16dc829d214ebd2b748638c7b4133d21509
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3743708
Reviewed-by: Philip Rogers <pdr@chromium.org>
Reviewed-by: Fredrik Söderquist <fs@opera.com>
Auto-Submit: Khushal Sagar <khushalsagar@chromium.org>
Commit-Queue: Khushal Sagar <khushalsagar@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1022723}

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wpt-commits: 6538541cf9a31f3597a7f41b672131fac6a8734e
wpt-pr: 34736