Add WebKit::fromAPI(WKEventModifiers) to convert to OptionSet<WebEventModifier>. Avoid use of OptionSet<WebEventModifier>::fromRaw() that assumes WKEventModifiers and WebEventModifier have the same enum values.
<rdar://problem/102539052>
Pull request: https://github.com/WebKit/WebKit/pull/6662
Committed 256917@main (f5fa0df8982c): <https://commits.webkit.org/256917@main> Reviewed commits have been landed. Closing PR #6662 and removing active labels.