Auto merge of #26926 - MDeiml:referrer-26570, r=jdm

Make url for "client" referrer mandatory

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I added a url attribute to `Referrer::Client` so that the referrer header can be set accordingly when fetching.

`Referrer::Client` has to be kept separate from `Referrer::ReferrerUrl` as they differ in this method
6b0d9afd6f/components/script/dom/request.rs (L566-L576)

---
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- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix #26570 (GitHub issue number if applicable)

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- [ ] There are tests for these changes OR
- [ ] These changes do not require tests because ___

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components/script/script_thread.rs

@@ -3669,13 +3669,12 @@ impl ScriptThread {
     /// argument until a notification is received that the fetch is complete.
     fn pre_page_load(&self, mut incomplete: InProgressLoad, load_data: LoadData) {
         let id = incomplete.pipeline_id.clone();
-        let req_init = RequestBuilder::new(load_data.url.clone())
+        let req_init = RequestBuilder::new(load_data.url.clone(), load_data.referrer)
             .method(load_data.method)
             .destination(Destination::Document)
             .credentials_mode(CredentialsMode::Include)
             .use_url_credentials(true)
             .pipeline_id(Some(id))
-            .referrer(load_data.referrer)
             .referrer_policy(load_data.referrer_policy)
             .headers(load_data.headers)
             .body(load_data.data)