[GLib] Add more padding to more vtables

[mcatanzaro]

7ca0c69

[GLib] Add more padding to more vtables
https://bugs.webkit.org/show_bug.cgi?id=252052

Reviewed by Adrian Perez de Castro.

Let's add more padding to these vtables for future-proofing. I am only
adding a small amount of additional padding because we never used any of
the previous padding and most likely that will not change.

* Source/JavaScriptCore/API/glib/JSCClass.h.in:
* Source/WebKit/UIProcess/API/glib/WebKitPolicyDecision.h.in:
* Tools/TestWebKitAPI/Tests/JavaScriptCore/glib/TestJSC.cpp:

Canonical link: https://commits.webkit.org/260396@main

bf2a81f

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	🛠 wincairo
✅ 🧪 bindings	🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🛠 gtk
✅ 🧪 webkitperl	🧪 ios-wk2	✅ 🧪 api-mac	🧪 gtk-wk2
	✅ 🧪 api-ios	✅ 🧪 mac-wk1	🧪 api-gtk
🛠 🧪 jsc	✅ 🛠 tv	✅ 🧪 mac-wk2	🛠 jsc-armv7
✅ 🛠 🧪 jsc-arm64	✅ 🛠 tv-sim	🧪 mac-AS-debug-wk2	🧪 jsc-armv7-tests
	✅ 🛠 watch	✅ 🧪 mac-wk2-stress	🛠 jsc-mips
✅ 🛠 🧪 merge	✅ 🛠 watch-sim		🧪 jsc-mips-tests

[webkit-early-warning-system]

EWS run on previous version of this PR (hash 7d8b849)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	❌ 🛠 wpe	✅ 🛠 wincairo
	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🛠 gtk
✅ 🧪 webkitperl	❌ 🧪 ios-wk2	✅ 🧪 api-mac	✅ 🧪 gtk-wk2
	✅ 🧪 api-ios	✅ 🧪 mac-wk1	✅ 🧪 api-gtk
✅ 🛠 🧪 jsc	✅ 🛠 tv	✅ 🧪 mac-wk2	✅ 🛠 jsc-armv7
✅ 🛠 🧪 jsc-arm64	✅ 🛠 tv-sim	✅ 🧪 mac-AS-debug-wk2	✅ 🧪 jsc-armv7-tests
	✅ 🛠 watch	✅ 🧪 mac-wk2-stress	✅ 🛠 jsc-mips
	✅ 🛠 watch-sim		✅ 🧪 jsc-mips-tests

[webkit-early-warning-system]

EWS run on previous version of this PR (hash 5453406)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	❌ 🛠 wpe	🛠 wincairo
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🛠 gtk
✅ 🧪 webkitperl	🧪 ios-wk2	✅ 🧪 api-mac	🧪 gtk-wk2
	✅ 🧪 api-ios	✅ 🧪 mac-wk1	🧪 api-gtk
✅ 🛠 🧪 jsc	✅ 🛠 tv	✅ 🧪 mac-wk2	⏳ 🛠 jsc-armv7
✅ 🛠 🧪 jsc-arm64	✅ 🛠 tv-sim	✅ 🧪 mac-AS-debug-wk2	⏳ 🧪 jsc-armv7-tests
	✅ 🛠 watch	✅ 🧪 mac-wk2-stress	✅ 🛠 jsc-mips
	✅ 🛠 watch-sim		🧪 jsc-mips-tests

[webkit-early-warning-system]

EWS run on current version of this PR (hash bf2a81f)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	🛠 wincairo
✅ 🧪 bindings	🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🛠 gtk
✅ 🧪 webkitperl	🧪 ios-wk2	✅ 🧪 api-mac	🧪 gtk-wk2
	✅ 🧪 api-ios	✅ 🧪 mac-wk1	🧪 api-gtk
🛠 🧪 jsc	✅ 🛠 tv	✅ 🧪 mac-wk2	🛠 jsc-armv7
✅ 🛠 🧪 jsc-arm64	✅ 🛠 tv-sim	🧪 mac-AS-debug-wk2	🧪 jsc-armv7-tests
	✅ 🛠 watch	✅ 🧪 mac-wk2-stress	🛠 jsc-mips
✅ 🛠 🧪 merge	✅ 🛠 watch-sim		🧪 jsc-mips-tests

[webkit-commit-queue]

Committed 260396@main (7ca0c69): https://commits.webkit.org/260396@main

Reviewed commits have been landed. Closing PR #10163 and removing active labels.