Bug 1760841 [wpt PR 33303] - [IndexedDB Storage Partition] (3) Add WPT to check for...

Bug 1760841 [wpt PR 33303] - [IndexedDB Storage Partition] (3) Add WPT to check for persistence, a=testonly

Automatic update from web-platform-tests
[IndexedDB Storage Partition] (3) Add WPT to check for persistence

Now that we have a stop-gap which simply de-persists all third-party idb
storage, we should add a WPT to check that when partitioning is on, the
storage is persisted.

This CL is a part of a series:
(1) Tentative WPT
(2) Add to third-party-storage-partitioning virtual suite
(3) Add WPT to check for persistence
(4) Migrate third party storage to buckets

Bug: 1218100
Change-Id: I3c43b70692c343830a2b14d7336b91642f5cb547
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3543365
Reviewed-by: Mason Freed <masonf@chromium.org>
Reviewed-by: Marijn Kruisselbrink <mek@chromium.org>
Commit-Queue: Ari Chivukula <arichiv@chromium.org>
Auto-Submit: Ari Chivukula <arichiv@chromium.org>
Cr-Commit-Position: refs/heads/main@{#984984}

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wpt-commits: 2d11a98a69004ff9b62713080c7c67d5b7124e0e
wpt-pr: 33303