Introduce ServiceWorkerMainResourceHandle::InitializeForRequest

This CL moves the `ServiceWorkerClient::UpdateUrls()` call and related
logic from `ServiceWorkerMainResourceLoaderInterceptor` to
`ServiceWorkerMainResourceHandle::InitializeForRequest`.

This is to decouple the logic from
`ServiceWorkerMainResourceLoaderInterceptor`, because the logic has to
be triggered on every redirects (even the redirect leg isn't controlled
by ServiceWorker) and ideally shouldn't be bound to
`ServiceWorkerMainResourceLoaderInterceptor`.

Bug: 40947546, 367755492
Change-Id: I6037654bbf9355ba78ed64fb6633e5136cbfd2be
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6176610
Reviewed-by: Arthur Sonzogni <arthursonzogni@chromium.org>
Reviewed-by: Shunya Shishido <sisidovski@chromium.org>
Reviewed-by: Keita Suzuki <suzukikeita@chromium.org>
Commit-Queue: Hiroshige Hayashizaki <hiroshige@chromium.org>
Reviewed-by: Yoshisato Yanagisawa <yyanagisawa@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1417428}