REGRESSION (271261@main?): [ macOS ] 2 tests in inspector/layers are flaky failures

[Marta Darbinyan]

Description:
The following tests became flaky on macOS ToT. The suspected commit is 271261@main.

inspector/layers/layers-compositing-reasons.html
inspector/layers/layers-blending-compositing-reasons.html

History:
https://results.webkit.org/?suite=layout-tests&suite=layout-tests&test=inspector%2Flayers%2Flayers-compositing-reasons.html&test=inspector%2Flayers%2Flayers-for-node.html

Diff logs:
@@ -13,6 +13,4 @@
 
 === Check layers' reasons for compositing ===
 
-PASS: <div id="isolating"> is composition due to isolating compositing descendants having CSS blending applied.
-PASS: <div id="blending"> is composited due having CSS blending applied and composited descendants.

Link:
https://build.webkit.org/results/Apple-Monterey-Release-WK1-Tests/271271@main%20(13004)/inspector/layers/layers-blending-compositing-reasons-pretty-diff.html

[Radar WebKit Bug Importer]

<rdar://problem/118943342>

[EWS]

Test gardening commit 271292@main (39f82c85db0a): <https://commits.webkit.org/271292@main>

Reviewed commits have been landed. Closing PR #21062 and removing active labels.

[Matt Woodrow]

Pull request: https://github.com/WebKit/WebKit/pull/21084

[Ryan Haddad]

*** Bug 265535 has been marked as a duplicate of this bug. ***