Delete cache storage for all buckets, not just default

This expands deletion of CacheStorage on shutdown to include
CacheStorage for the given origin in buckets other than "default".

Bug: 1376071
Change-Id: I6e95733ed1234e82b8289dfb4269b2d97cc0f301
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4350528


Commit-Queue: Dustin Mitchell <djmitche@chromium.org>
Reviewed-by: Ayu Ishii <ayui@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1118869}