fast/css-generated-content/initial-letter-first-line-wrapping.html is marked as an ImageOnlyFailure for macOS but passes, we need to udpate TestExpectations to reflect that.
<rdar://problem/119463889>
Test gardening commit 271846@main (a7a006e5ab8e): <https://commits.webkit.org/271846@main> Reviewed commits have been landed. Closing PR #21603 and removing active labels.