Sync bidirectional text UA Stylesheet rules from HTML Web Specification

[Ahmad-S792]

Sync `bidirectional text` UA Stylesheet rules from HTML Web Specification
https://bugs.webkit.org/show_bug.cgi?id=65617
rdar://problem/96912726

Reviewed by NOBODY (OOPS!).

This patch is to align WebKit with Web-Specification [1]:

[1] https://html.spec.whatwg.org/multipage/rendering.html#bidi-rendering

It syncs all bidirectional text user agent stylesheet rules to ensure that 
all HTML elements have respect direction based as per standard.

Currently, we cannot add all UA rules, so add appropriate
FIXME with bug references or function names.

Credits to Noam Rosenthal for reference initial test changes.

* Source/WebCore/css/html.css: From Web-Spec except few targeted changes
(summary): Add FIXME
(hr): Remove 'unicode-bidi' to add in single place
(bdo): Update to have `isolate-override`
(ruby): Add as per 'ruby' spec
* Source/WebCore/html/HTMLElement.cpp:
(unicodeBidiAttributeForDirAuto): Deleted
(HTMLElement::collectPresentationalHintsForAttribute): Deleted reference
and use 'html.css' as single source of truth
* Tools/TestWebKitAPI/Tests/WebKitCocoa/WKWebViewEditActions.mm:
(ModifyTextWritingDirection): Update Test

> Test & Test Expectations Update:
* LayoutTests/platform/wpe/fast/text/word-break-expected.txt:
* LayoutTests/platform/mac/fast/text/word-break-expected.txt:

78ad3f9

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

[webkit-early-warning-system]

EWS run on previous version of this PR (hash 3e294e3)

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

[webkit-early-warning-system]

EWS run on previous version of this PR (hash ee122d6)

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

[webkit-early-warning-system]

EWS run on previous version of this PR (hash efe188c)

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

[webkit-early-warning-system]

EWS run on previous version of this PR (hash 5aa1acb)

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

[webkit-early-warning-system]

EWS run on previous version of this PR (hash 04e6246)

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

[webkit-early-warning-system]

EWS run on current version of this PR (hash 78ad3f9)

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