Auto merge of #14083 - rnestler:fix_14018, r=jdm

Add redirect_mode to RequestInit

This adds support for non-follow redirect modes for `RequestInit`.
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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 #14018 (github issue number if applicable).
- [x] There are tests for these changes

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components/script/fetch.rs

@@ -61,6 +61,7 @@ fn request_init_from_request(request: NetTraitsRequest) -> NetTraitsRequestInit
         referrer_url: from_referrer_to_referrer_url(&request),
         referrer_policy: request.referrer_policy.get(),
         pipeline_id: request.pipeline_id.get(),
+        redirect_mode: request.redirect_mode.get(),
     }
 }