fix(multiple): remove webkit-overflow-scrolling

[mmalerba]

This is a non-standard CSS property that only works on mobile Safari and may cause inconsistent behavior by introducing a new stacking context. Users who want this behavior can add the property themselves, but we shouldn't specify it by default.

fixes #19374

[crisbeto]

Given that we haven't heard about this being an issue outside of #19374 which is quite old, I'm not sure if we should do this. IIRC without it the scrolling on mobile Safari gets quite janky.

[mmalerba]

I don't have an iOS device myself to test. But I'm kind of surprised to hear that its so janky, given that most of the web probably doesn't use this property, and it would therefore be kind of a pain to use most websites on iphone ¯\(ツ)/¯

Do you have an iOS device to give it a quick test?

[github-actions]

Deployed dev-app for dccabbe to: https://ng-dev-previews-comp--pr-angular-components-30003-dev-io1r1vtm.web.app

Note: As new commits are pushed to this pull request, this link is updated after the preview is rebuilt.

[mmalerba]

It sounds like it hasn't been required since safari 13: https://developer.apple.com/documentation/safari-release-notes/safari-13-release-notes#Layout-and-Rendering

Added support for one-finger accelerated scrolling to all frames and overflow:scroll elements eliminating the need to set-webkit-overflow-scrolling: touch.

[crisbeto]

Just tried it out and I didn't notice a difference in the dev app so I guess it's fine.

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