[WebDriver] Add BiDi webSocketUrl capability

[lauromoura]

e5d5d48831fc586a74edc2a0251e773a16c4259a

[WebDriver] Add BiDi webSocketUrl capability
https://bugs.webkit.org/show_bug.cgi?id=278390

Reviewed by NOBODY (OOPS!).

This is a new capability defined by the Webdriver Bidi spec[1]. When the
user sends `webSocketUrl==true`, it means the user requested a BiDi
session in parallel to the classic session being initiated.

This commit adds support for parsing and processing webSocketURL, failing
the capability negotiation explictly if the user requested it and we don't
support BiDi, which is the case for now, instead of failing as a unknown
capability key in WebDriverService::validatedCapabilities().

bug230615 (BiDi session support) will build on top of this to make use of
this capability to actually setup BiDi sessions.

Note: The platformSupportBidi() definitions are already split among the
port-specific files, so each port can enable it individually.

[1] https://w3c.github.io/webdriver-bidi/#websocket-url

* Source/WebDriver/Capabilities.h:
* Source/WebDriver/WebDriverService.cpp:
(WebDriver::WebDriverService::parseCapabilities const):
(WebDriver::WebDriverService::validatedCapabilities const):
(WebDriver::WebDriverService::matchCapabilities const):
* Source/WebDriver/WebDriverService.h:
* Source/WebDriver/glib/WebDriverServiceGLib.cpp:
(WebDriver::WebDriverService::platformSupportBidi const):
* Source/WebDriver/playstation/WebDriverServicePlayStation.cpp:
(WebDriver::WebDriverService::platformSupportBidi const):
* Source/WebDriver/win/WebDriverServiceWin.cpp:
(WebDriver::WebDriverService::platformSupportBidi const):

https://github.com/WebKit/WebKit/commit/e5d5d48831fc586a74edc2a0251e773a16c4259a

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

[webkit-early-warning-system]

EWS run on previous version of this PR (hash https://github.com/WebKit/WebKit/commit/e5d5d48831fc586a74edc2a0251e773a16c4259a)

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

[webkit-early-warning-system]

EWS run on current version of this PR (hash https://github.com/WebKit/WebKit/commit/dca980967ddd7bb4419ff0a5cae77b27ab6162a0)

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

[webkit-commit-queue]

Committed 283007@main (311f6ee395f7): https://commits.webkit.org/283007@main

Reviewed commits have been landed. Closing PR #32463 and removing active labels.