Fix bad assertion in CanvasNoiseInjection's isIndexInBounds(). It causes crashes in API tests such as AdvancedPrivacyProtections.VerifyPixelsFromNoisyCanvas2DAPI.
<rdar://problem/108168809>
Pull request: https://github.com/WebKit/WebKit/pull/14885
Pull request: https://github.com/WebKit/WebKit/pull/14886
Committed 265085@main (02f749891721): <https://commits.webkit.org/265085@main> Reviewed commits have been landed. Closing PR #14886 and removing active labels.