Revise a few WPT tests expectations based on review feedback from the WPT team.
<rdar://problem/107900238>
Pull request: https://github.com/WebKit/WebKit/pull/12623
Note: This is a revert of https://commits.webkit.org/262031@main, plus a small change to a new fuzziness value.
Committed 262881@main (893e62e7ce3b): <https://commits.webkit.org/262881@main> Reviewed commits have been landed. Closing PR #12623 and removing active labels.