Bug 314982 – [css-grid] Resync `css/css-grid` from WPT Upstream

• Component: CSS
• Status: RESOLVED FIXED

[Brandon]

Upstream commit: https://github.com/web-platform-tests/wpt/commit/c05b447326585237713013c66341eab2cdf967b6

Imported 1912 tests (1279 reftests, 609 JS tests, 24 crash tests,
24 pixel/manual tests) from the upstream css/css-grid suite. Regenerated
expected.txt baselines for six tests in grid-lanes/items/ and parsing/
whose upstream content gained new subtests; these are upstream-driven
baseline updates, not WebKit regressions.

Test expectation changes for the 5 newly-surfaced regressions:
removed one entry for grid-lanes-subgrid-flex.html (now passes after
the upstream reference update), added [ ImageOnlyFailure ] for four
column-subgrid-with-row-standalone-axis-size-006..009 reftests, and
added [ Crash ] for grid-lanes/animation/flow-tolerance-interpolation.html.

The four replaced-element-percentage-height-in-grid-nested-in-flex-001/002
tests added locally in 24df15c2db8d (rdar://169431440) are preserved;
they are not yet upstream and were re-staged after the import.

[Radar WebKit Bug Importer]

<rdar://problem/177290573>

[Brandon]

Pull request: https://github.com/WebKit/WebKit/pull/65067

[EWS]

Committed 314228@main (31bb7e0083d8): <https://commits.webkit.org/314228@main>

Reviewed commits have been landed. Closing PR #65067 and removing active labels.