[WPE] WPE Platform: add wpe_keymap_translate_keyboard_state()

[carlosgcampos]

f873c16

[WPE] WPE Platform: add wpe_keymap_translate_keyboard_state()
https://bugs.webkit.org/show_bug.cgi?id=274143

Reviewed by Alejandro G. Castro.

This will be needed by automation.

* Source/WebKit/WPEPlatform/wpe/WPEKeymap.cpp:
(wpe_keymap_translate_keyboard_state):
* Source/WebKit/WPEPlatform/wpe/WPEKeymap.h:
* Source/WebKit/WPEPlatform/wpe/WPEKeymapXKB.cpp:
(xkbModifiersFromWPEModifiers):
(wpeModifiersFromXKBModifiers):
(wpeKeymapXKBTranslateKeyboardState):
(wpeKeymapXKBGetModifiers):
(wpe_keymap_xkb_class_init):

Canonical link: https://commits.webkit.org/278854@main

e912578

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

[webkit-early-warning-system]

EWS run on current version of this PR (hash e912578)

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

[alexgcastro]

LGTM!

[webkit-commit-queue]

Committed 278854@main (f873c16): https://commits.webkit.org/278854@main

Reviewed commits have been landed. Closing PR #28524 and removing active labels.