Bug 1775220 [wpt PR 34502] - Remove 'tentative' from the wpt test for nesting :has(), a=testonly

Automatic update from web-platform-tests
Remove 'tentative' from the wpt test for nesting :has()

The resolution of csswg issue #6952 has been applied:
- w3c/csswg-drafts#7344

Bug: 1334631
Change-Id: Ied9c791aa729f9f1aeef02ddf9902c94736277b5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3714637
Commit-Queue: Byungwoo Lee 
Reviewed-by: Rune Lillesveen 
Cr-Commit-Position: refs/heads/main@{#1016121}

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wpt-commits: 825b8cfbf84c250bb351d2172525912d999677a4
wpt-pr: 34502

Author: byung-woo