Port 83ff405b

Original Commit Message:

    Flood functions with breakpoints to prepare them for stepping. With a
    small modification to the runtime function, this already implements a
    basic step over functionality.

    We still cannot resume, step in or step out (including stepping over a
    return instruction).

R=thibaudm@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
LOG=N

Change-Id: Id153b2611c528e679e8d7722e3d209fb15bcf6d1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2105055Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#66724}