[css-anchor-position] Check position-visibility on non-stacking-context

If an anchored element with position-visibility is not a stacking
context, when it's hidden due to position-visibility rules, its
self-paiting descendants need to walk up the tree to check the if
there is such an ancestor needing them to hide.

Bug: 329703412
Change-Id: I950bc597c1bc37024a6a7cf38ed62094a904af9b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5406469


Reviewed-by: Philip Rogers <pdr@chromium.org>
Commit-Queue: Xianzhu Wang <wangxianzhu@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1280460}