[Wasm-GC] Begin importing GC spec tests

[takikawa]

8ac6345

[Wasm-GC] Begin importing GC spec tests
https://bugs.webkit.org/show_bug.cgi?id=247336

Reviewed by Justin Michaud.

This patch creates a Wasm GC proposal spec test harness and test suite
from the upstream repository at

  https://github.com/WebAssembly/gc (commit 5404857b61a42b4d9fdd99f6b78d8febb266f1fc)

The tests contain a subset of the upstream tests that are currently
runnable in JSC. Some of the tests are commented out due to open bugs
that block them.

In addition, this patch fixes a small bug (a missing type expansion use)
revealed by the tests.

* JSTests/wasm.yaml:
* JSTests/wasm/gc-spec-harness.js: Added.
(import.string_appeared_here.then):
(test):
(promise_test):
(let.assert_unreached):
(let.console.log):
* JSTests/wasm/gc-spec-harness/async_index.js: Added.
(let.testNum):
(uniqueTest):
(assertThrows):
(externref):
(is_externref):
(is_funcref):
(eq_externref):
(eq_funcref):
(binary):
(module):
(assert_invalid):
(instance):
(exports):
(then.):
(reinitializeRegistry.get promise_test):
(reinitializeRegistry):
(catch):
(assert_exhaustion):
(get const):
* JSTests/wasm/gc-spec-harness/sync_index.js: Added.
(let.testNum):
(assertThrows):
(_assert):
(ValueResult):
(ErrorResult):
(Result.prototype.isError):
(externref):
(is_externref):
(is_funcref):
(eq_externref):
(eq_funcref):
(reinitializeRegistry.let.handler.get return):
(binary):
(module):
* JSTests/wasm/gc-spec-tests/type-canon.wast.js: Added.
* JSTests/wasm/gc-spec-tests/type-equivalence.wast.js: Added.
* JSTests/wasm/gc-spec-tests/type-rec.wast.js: Added.
* JSTests/wasm/gc-spec-tests/type-subtyping.wast.js: Added.
* Source/JavaScriptCore/wasm/js/WebAssemblyFunction.cpp:
(JSC::WebAssemblyFunction::jsCallEntrypointSlow):
* Tools/Scripts/run-jsc-stress-tests:

Canonical link: https://commits.webkit.org/256417@main

fa454d2

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

[webkit-early-warning-system]

EWS run on previous version of this PR (hash 0e64418)

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

[webkit-early-warning-system]

EWS run on current version of this PR (hash fa454d2)

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

[justinmichaud]

r=me

[webkit-commit-queue]

Committed 256417@main (8ac6345): https://commits.webkit.org/256417@main

Reviewed commits have been landed. Closing PR #6067 and removing active labels.