Pass &mut JSContext (#43543)

This is follow-up of #41459.

We replace some of these:

```rust
let mut cx = unsafe { script_bindings::script_runtime::temp_cx() };
```

..by passing a `cx: &mut JSContext` instead.

---

Testing: existing WPT tests  
Fixes: #43453

Signed-off-by: pylbrecht <pylbrecht@mailbox.org>

components/script/dom/html/htmlscriptelement.rs

@@ -962,12 +962,12 @@ impl HTMLScriptElement {
                     };
 
                     fetch_inline_module_script(
+                        cx,
                         ModuleOwner::Window(Trusted::new(self)),
                         text_rc,
                         base_url,
                         options,
                         self.line_number as u32,
-                        CanGc::from_cx(cx),
                     );
                 },
                 ScriptType::ImportMap => {