Add basic support for handling module scripts in workers (#40365)

While we now pass a lot of worker tests, we still fail a bunch:
```
% fd '^worker-.*.html.ini'
tests/wpt/meta/content-security-policy/gen/top.http-rp/script-src-self/worker-import.http.html.ini
tests/wpt/meta/content-security-policy/gen/top.http-rp/script-src-self/worker-import.https.html.ini
tests/wpt/meta/content-security-policy/gen/top.http-rp/worker-src-self/worker-import.http.html.ini
tests/wpt/meta/content-security-policy/gen/top.http-rp/worker-src-self/worker-import.https.html.ini
tests/wpt/meta/content-security-policy/gen/top.meta/script-src-self/worker-import.http.html.ini
tests/wpt/meta/content-security-policy/gen/top.meta/script-src-self/worker-import.https.html.ini
tests/wpt/meta/content-security-policy/gen/top.meta/worker-src-self/worker-import.http.html.ini
tests/wpt/meta/content-security-policy/gen/top.meta/worker-src-self/worker-import.https.html.ini
tests/wpt/meta/content-security-policy/script-src/worker-data-set-timeout.sub.html.ini
tests/wpt/meta/content-security-policy/script-src/worker-importscripts.sub.html.ini
tests/wpt/meta/content-security-policy/script-src/worker-set-timeout.sub.html.ini
tests/wpt/meta/fetch/metadata/generated/worker-dedicated-constructor.sub.html.ini
tests/wpt/meta/fetch/metadata/generated/worker-dedicated-importscripts.https.sub.html.ini
tests/wpt/meta/fetch/metadata/generated/worker-dedicated-importscripts.sub.html.ini
tests/wpt/meta/mixed-content/gen/top.http-rp/opt-in/worker-import-data.https.html.ini
tests/wpt/meta/mixed-content/gen/top.http-rp/opt-in/worker-import.https.html.ini
tests/wpt/meta/referrer-policy/generic/subresource-test/worker-messaging.html.ini
tests/wpt/meta/service-workers/service-worker/worker-client-id.https.html.ini
tests/wpt/meta/service-workers/service-worker/worker-in-sandboxed-iframe-by-csp-fetch-event.https.html.ini
tests/wpt/meta/service-workers/service-worker/worker-interception-redirect.https.html.ini
tests/wpt/meta/service-workers/service-worker/worker-interception.https.html.ini
tests/wpt/meta/upgrade-insecure-requests/gen/worker-classic.http-rp/upgrade/worker-classic.https.html.ini
tests/wpt/meta/upgrade-insecure-requests/gen/worker-classic.http-rp/upgrade/worker-module.https.html.ini
tests/wpt/meta/upgrade-insecure-requests/gen/worker-module.http-rp/upgrade/worker-classic.https.html.ini
tests/wpt/meta/upgrade-insecure-requests/gen/worker-module.http-rp/upgrade/worker-module.https.html.ini
tests/wpt/meta/wasm/webapi/esm-integration/worker-import-source-phase.tentative.html.ini
tests/wpt/meta/wasm/webapi/esm-integration/worker-import.tentative.html.ini
tests/wpt/meta/workers/Worker-creation-happens-in-parallel.https.html.ini
tests/wpt/meta/workers/Worker-postMessage-happens-in-parallel.https.html.ini
tests/wpt/meta/workers/Worker-terminate-forever-during-evaluation.html.ini
tests/wpt/meta/workers/worker-request-animation-frame.html.ini
```

Also, we are passing `Option<PolicyContainer>` down the call stack
through `LoadState`, which is more of a workaround. However, since
maintaining this long-lived branch is becoming a bit painful (merge
conflicts) and I was starting to lose momentum because of that, I would
like get this merged rather sooner than later.

We will address the failing tests and find the right place for
`PolicyContainer` in follow-ups, including the added
`#[allow(clippy::too_many_arguments)]`.


# See also
* https://html.spec.whatwg.org/multipage/#worker-processing-model
*
https://html.spec.whatwg.org/multipage/#fetch-a-module-worker-script-tree

---

Fixes: #23308
Testing: WPT tests

Signed-off-by: pylbrecht <pylbrecht@mailbox.org>
Co-authored-by: Gae24 <96017547+Gae24@users.noreply.github.com>

components/script/dom/html/htmlscriptelement.rs

@@ -888,10 +888,10 @@ impl HTMLScriptElement {
 
                     // Step 31.11. Fetch an external module script graph.
                     fetch_an_external_module_script(
+                        cx,
                         url,
                         ModuleOwner::Window(Trusted::new(self)),
                         options,
-                        CanGc::from_cx(cx),
                     );
 
                     if !asynch && was_parser_inserted {