[hashmap] Specialize entries with Address keys

They explicitly aren't Key*, but can be treated similarly.

Change-Id: Ib2c403425681a16014640bb3768cf60c85c4a287
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/5724451


Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Auto-Submit: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/main@{#95133}