Add option for presenting the web view share sheet modally

[TrevorStevenson]

5fd36e55ae1d0cd2c7392005292fce4317b5e633

Add option for presenting the web view share sheet modally
https://bugs.webkit.org/show_bug.cgi?id=246376
rdar://101050446

Reviewed by NOBODY (OOPS!).

Add an option to present the web view's share sheet modally instead of as a
popover.

* Source/WebKit/Platform/spi/ios/UIKitSPI.h:
* Source/WebKit/UIProcess/Cocoa/WKShareSheet.mm:
(-[WKShareSheet presentWithShareDataArray:inRect:]):

https://github.com/WebKit/WebKit/commit/5fd36e55ae1d0cd2c7392005292fce4317b5e633

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe
	✅ 🛠 ios-sim	✅ 🛠 mac-debug	✅ 🛠 gtk	✅ 🛠 wincairo
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🛠 mac-AS-debug	✅ 🧪 gtk-wk2
	✅ 🧪 api-ios	✅ 🧪 api-mac	❌ 🧪 api-gtk
	✅ 🛠 tv	✅ 🧪 mac-wk1
	✅ 🛠 tv-sim	❌ 🧪 mac-wk2
	✅ 🛠 watch	✅ 🧪 mac-AS-debug-wk2
	✅ 🛠 watch-sim	✅ 🧪 mac-wk2-stress

[webkit-early-warning-system]

EWS run on previous version of this PR (hash https://github.com/WebKit/WebKit/commit/b9c742e4d81df557630da9e26c68bc00fd881972)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	❌ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	⏳ 🛠 🧪 win
	❌ 🛠 ios-sim	⏳ 🛠 mac-debug	⏳ 🛠 gtk	⏳ 🛠 wincairo
✅ 🧪 webkitperl	❌ 🧪 ios-wk2	✅ 🛠 mac-AS-debug	⏳ 🧪 gtk-wk2
	❌ 🧪 api-ios	~~🧪 api-mac~~	⏳ 🧪 api-gtk
⏳ 🛠 🧪 jsc	⏳ 🛠 tv	~~🧪 mac-wk1~~
	✅ 🛠 tv-sim	~~🧪 mac-wk2~~
	✅ 🛠 watch	~~🧪 mac-AS-debug-wk2~~
	✅ 🛠 watch-sim	~~🧪 mac-wk2-stress~~

[webkit-early-warning-system]

EWS run on previous version of this PR (hash https://github.com/WebKit/WebKit/commit/225bf4435a1debb0f7f9c69fae79ca333fd5addd)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	~~🛠 ios~~	✅ 🛠 mac	⏳ 🛠 wpe	⏳ 🛠 🧪 win
	~~🛠 ios-sim~~	⏳ 🛠 mac-debug	⏳ 🛠 gtk	⏳ 🛠 wincairo
✅ 🧪 webkitperl	~~🧪 ios-wk2~~	✅ 🛠 mac-AS-debug	⏳ 🧪 gtk-wk2
	~~🧪 api-ios~~	⏳ 🧪 api-mac	⏳ 🧪 api-gtk
⏳ 🛠 🧪 jsc	⏳ 🛠 tv	⏳ 🧪 mac-wk1
	❌ 🛠 tv-sim	⏳ 🧪 mac-wk2
	~~🛠 watch~~	⏳ 🧪 mac-AS-debug-wk2
	❌ 🛠 watch-sim	~~🧪 mac-wk2-stress~~

[webkit-early-warning-system]

EWS run on current version of this PR (hash https://github.com/WebKit/WebKit/commit/d35a86f84385791c19a97ef94be8a80458f8305a)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
🧪 style	🛠 ios	🛠 mac	⏳ 🛠 wpe	⏳ 🛠 🧪 win
	🛠 ios-sim	⏳ 🛠 mac-debug	⏳ 🛠 gtk	⏳ 🛠 wincairo
🧪 webkitperl	🧪 ios-wk2	🛠 mac-AS-debug	⏳ 🧪 gtk-wk2
	🧪 api-ios	🧪 api-mac	⏳ 🧪 api-gtk
⏳ 🛠 🧪 jsc	⏳ 🛠 tv	🧪 mac-wk1
	🛠 tv-sim	🧪 mac-wk2
	🛠 watch	🧪 mac-AS-debug-wk2
	🛠 watch-sim	🧪 mac-wk2-stress

[webkit-early-warning-system]

EWS run on previous version of this PR (hash https://github.com/WebKit/WebKit/commit/d35a86f84385791c19a97ef94be8a80458f8305a)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	⏳ 🛠 🧪 win
	✅ 🛠 ios-sim	✅ 🛠 mac-debug	✅ 🛠 gtk	⏳ 🛠 wincairo
✅ 🧪 webkitperl	~~🧪 ios-wk2~~	✅ 🛠 mac-AS-debug	✅ 🧪 gtk-wk2
	~~🧪 api-ios~~	~~🧪 api-mac~~	~~🧪 api-gtk~~
	✅ 🛠 tv	~~🧪 mac-wk1~~
	✅ 🛠 tv-sim	~~🧪 mac-wk2~~
	✅ 🛠 watch	~~🧪 mac-AS-debug-wk2~~
	✅ 🛠 watch-sim	✅ 🧪 mac-wk2-stress

[webkit-early-warning-system]

EWS run on previous version of this PR (hash https://github.com/WebKit/WebKit/commit/41c0414b2cef85e0e229013c7174386adccf3210)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	⏳ 🛠 🧪 win
	✅ 🛠 ios-sim	✅ 🛠 mac-debug	✅ 🛠 gtk	✅ 🛠 wincairo
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🛠 mac-AS-debug	✅ 🧪 gtk-wk2
	✅ 🧪 api-ios	✅ 🧪 api-mac	✅ 🧪 api-gtk
	✅ 🛠 tv	✅ 🧪 mac-wk1
	✅ 🛠 tv-sim	❌ 🧪 mac-wk2
	✅ 🛠 watch	✅ 🧪 mac-AS-debug-wk2
	✅ 🛠 watch-sim	✅ 🧪 mac-wk2-stress

[webkit-early-warning-system]

EWS run on previous version of this PR (hash https://github.com/WebKit/WebKit/commit/5fd36e55ae1d0cd2c7392005292fce4317b5e633)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe
	✅ 🛠 ios-sim	✅ 🛠 mac-debug	✅ 🛠 gtk	✅ 🛠 wincairo
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🛠 mac-AS-debug	✅ 🧪 gtk-wk2
	✅ 🧪 api-ios	✅ 🧪 api-mac	❌ 🧪 api-gtk
	✅ 🛠 tv	✅ 🧪 mac-wk1
	✅ 🛠 tv-sim	❌ 🧪 mac-wk2
	✅ 🛠 watch	✅ 🧪 mac-AS-debug-wk2
	✅ 🛠 watch-sim	✅ 🧪 mac-wk2-stress

[webkit-early-warning-system]

EWS run on current version of this PR (hash https://github.com/WebKit/WebKit/commit/b186622645b0b21113e1f79aeaa9538950372a31)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe
	✅ 🛠 ios-sim	✅ 🛠 mac-debug	✅ 🛠 gtk	✅ 🛠 wincairo
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🛠 mac-AS-debug	✅ 🧪 gtk-wk2
	✅ 🧪 api-ios	✅ 🧪 api-mac	✅ 🧪 api-gtk
	✅ 🛠 tv	✅ 🧪 mac-wk1
	✅ 🛠 tv-sim	✅ 🧪 mac-wk2
✅ 🛠 🧪 merge	✅ 🛠 watch	✅ 🧪 mac-AS-debug-wk2
	✅ 🛠 watch-sim	✅ 🧪 mac-wk2-stress

[webkit-commit-queue]

Committed 255794@main (c7c7e5c69bfd): https://commits.webkit.org/255794@main

Reviewed commits have been landed. Closing PR #5270 and removing active labels.