script: Initialize all requests with clients (#41584)

In preparation for adding preload support for all requests, we need to
add relevant client information to all these entrypoints. Additionally,
for links we now also set the referrer correctly and initialize
documents. All of which are required to start loading preload
information when processing requests.

Part of #35035

Signed-off-by: Tim van der Lippe <tvanderlippe@gmail.com>
Co-authored-by: Josh Matthews <josh@joshmatthews.net>

components/script/dom/html/htmlscriptelement.rs

@@ -19,7 +19,7 @@ use net_traits::http_status::HttpStatus;
 use net_traits::policy_container::PolicyContainer;
 use net_traits::request::{
     CorsSettings, CredentialsMode, Destination, InsecureRequestsPolicy, ParserMetadata,
-    RequestBuilder, RequestId,
+    RequestBuilder, RequestClient, RequestId,
 };
 use net_traits::{FetchMetadata, Metadata, NetworkError, ResourceFetchTiming};
 use servo_url::{ImmutableOrigin, ServoUrl};
@@ -520,6 +520,7 @@ pub(crate) fn script_fetch_request(
     insecure_requests_policy: InsecureRequestsPolicy,
     has_trustworthy_ancestor_origin: bool,
     policy_container: PolicyContainer,
+    client: RequestClient,
 ) -> RequestBuilder {
     // We intentionally ignore options' credentials_mode member for classic scripts.
     // The mode is initialized by create_a_potential_cors_request.
@@ -533,6 +534,7 @@ pub(crate) fn script_fetch_request(
         insecure_requests_policy,
         has_trustworthy_ancestor_origin,
         policy_container,
+        client,
     )
     .origin(origin)
     .pipeline_id(Some(pipeline_id))
@@ -564,6 +566,7 @@ fn fetch_a_classic_script(
         doc.insecure_requests_policy(),
         doc.has_trustworthy_ancestor_origin(),
         global.policy_container(),
+        global.request_client(),
     );
     let request = doc.prepare_request(request);