[iOS] Use the long press location

This CL updates the provider and pass along the long press location.

It is part of a 3 CL change
 - crrev.com/i/6379790 : internal preparatory work to API change
 => crrev.com/c/4813246 : update API
 - crrev.com/i/6378973 : use the new API and cleanup.

Bug: 468905
Change-Id: I4e9478fbbf8126f4a4a724402b732345f296c3ba
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4813246
Reviewed-by: Sylvain Defresne <sdefresne@chromium.org>
Reviewed-by: David Jean <djean@chromium.org>
Commit-Queue: Elmehdi Rahmaoui <erahmaoui@google.com>
Cr-Commit-Position: refs/heads/main@{#1188570}