Implement Request & Response's bytes() method

[annevk]

d83d8617a32a10aa5084b28ddf8061bf38537183

Implement Request & Response's bytes() method
https://bugs.webkit.org/show_bug.cgi?id=274102

Reviewed by NOBODY (OOPS!).

This accessor is nearly identical to arrayBuffer() except that it
yields a Uint8Array, which is strictly more useful.

Fetch change: https://github.com/whatwg/fetch/pull/1753.

* LayoutTests/imported/w3c/web-platform-tests/fetch/api/abort/general.any-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/fetch/api/abort/general.any.serviceworker-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/fetch/api/abort/general.any.sharedworker-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/fetch/api/abort/general.any.worker-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/fetch/api/abort/serviceworker-intercepted.https-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/fetch/api/request/request-consume.any-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/fetch/api/request/request-consume.any.serviceworker-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/fetch/api/request/request-consume.any.sharedworker-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/fetch/api/request/request-consume.any.worker-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/fetch/api/response/response-blob-realm.any-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/fetch/api/response/response-error-from-stream.any-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/fetch/api/response/response-error-from-stream.any.serviceworker-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/fetch/api/response/response-error-from-stream.any.sharedworker-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/fetch/api/response/response-error-from-stream.any.worker-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/fetch/api/response/response-stream-bad-chunk.any-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/fetch/api/response/response-stream-bad-chunk.any.serviceworker-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/fetch/api/response/response-stream-bad-chunk.any.sharedworker-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/fetch/api/response/response-stream-bad-chunk.any.worker-expected.txt:
* Source/WebCore/Modules/fetch/FetchBody.cpp:
(WebCore::FetchBody::bytes):
* Source/WebCore/Modules/fetch/FetchBody.h:
* Source/WebCore/Modules/fetch/FetchBody.idl:
* Source/WebCore/Modules/fetch/FetchBodyConsumer.cpp:
(WebCore::resolveWithTypeAndData):
(WebCore::FetchBodyConsumer::resolve):
* Source/WebCore/Modules/fetch/FetchBodyConsumer.h:
* Source/WebCore/Modules/fetch/FetchBodyOwner.cpp:
(WebCore::FetchBodyOwner::bytes):
* Source/WebCore/Modules/fetch/FetchBodyOwner.h:
* Source/WebCore/bindings/js/JSDOMPromiseDeferred.cpp:
(WebCore::fulfillPromiseWithUint8Array):
(WebCore::fulfillPromiseWithUint8ArrayFromSpan):
* Source/WebCore/bindings/js/JSDOMPromiseDeferred.h:

https://github.com/WebKit/WebKit/commit/d83d8617a32a10aa5084b28ddf8061bf38537183

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

[webkit-early-warning-system]

EWS run on previous version of this PR (hash https://github.com/WebKit/WebKit/commit/ccbc415f7e2a893e82874b2169f79ee4e3cf506f)

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

[webkit-early-warning-system]

EWS run on previous version of this PR (hash https://github.com/WebKit/WebKit/commit/d83d8617a32a10aa5084b28ddf8061bf38537183)

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

[webkit-early-warning-system]

EWS run on current version of this PR (hash https://github.com/WebKit/WebKit/commit/b056b07afec284cf92392f983d727a4d8bc9ead0)

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

[webkit-commit-queue]

Committed 279036@main (a534f04d1a2e): https://commits.webkit.org/279036@main

Reviewed commits have been landed. Closing PR #28530 and removing active labels.