[Wasm-GC] Fix structure TypeInfo for JSWebAssemblyStruct

[catamorphism]

5e75a56

[Wasm-GC] Fix structure `TypeInfo` for `JSWebAssemblyStruct`
https://bugs.webkit.org/show_bug.cgi?id=250613

Reviewed by NOBODY (OOPS!).

Previously, the `JSWebAssemblyStruct::createStructure()` method was passing in
`FinalObjectType` as its `TypeInfo` when creating a `Structure`. This was
inconsistent with the declaration of the `JSWebAssemblyStruct` class, which
inherits from `JSNonFinalObject`. Use `ObjectType` to be consistent with
the inheritance declaration.

* Source/JavaScriptCore/wasm/js/JSWebAssemblyStruct.h:

5e75a56

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 🧪 win
	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🛠 gtk	🛠 wincairo
✅ 🧪 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 d1fa040)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	🛠 🧪 win
	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🛠 gtk	⏳ 🛠 wincairo
✅ 🧪 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 5e75a56)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 🧪 win
	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🛠 gtk	🛠 wincairo
✅ 🧪 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