Add CreateServiceWorkerProvider plumbing for dedicated workers

This adds CreateServiceWorkerProvider plumbing to various classes. This
is part of the change for https://crbug.com/40364838 in order to support
Service Worker APIs in dedicated workers.

This change adds the plumbing to classes (and interface):

blink::DedicatedWorkerGlobalScope::CreateServiceWorkerProvider
blink::DedicatedOrSharedWorkerGlobalScopeContextImpl::CreateServiceWorkerProvider
content::ServiceWorkerProviderContext::CreateServiceWorkerProvider

The plumbing is new CreateServiceWorkerProvider methods for
blink::ServiceWorkerContainer::From to call in a future change.
Additionally it is updates to those classes to keep references to state
so they can forward the calls on to implement
CreateServiceWorkerProvider.

Bug: 40364838
Change-Id: Iddfe5a69771edfdc21872acf6cfb9b8832fb032c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6598900
Reviewed-by: Yoshisato Yanagisawa <yyanagisawa@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Liang Zhao <lzhao@microsoft.com>
Commit-Queue: Dave Risney <david.risney@microsoft.com>
Cr-Commit-Position: refs/heads/main@{#1468471}