Pushes the optimised code path to after the main interpreter path, so
the straightline path is just normal interpretation.

Bug: v8:9771
Change-Id: I2f48ff290efcd85a5e30cf823027919560f8a56a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1829220Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64066}