Block inputs are removed from the stack. Set expected stack height
accordingly.

R=ahaas@chromium.org

Bug: v8:9867
Change-Id: I7e3fd2985c0e77e83d5551cac613788f3cf0a370
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1872404
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64465}