The Osr context is a pointer, and we can make it clear in the Typer.

Known pitfall: If we have a context within a context, the innner context
pointer is typed as Any.

Change-Id: Ia4d7e43ef42ef03f835e4b71d32d117ae835feee
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1741659Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63153}