Stepping only happens in one frame at a time, so we don't need to
rewrite the whole stack. This allows us to remove the
{flooded_function_index_}, since no function is globally flooded any
more.
A follow-up CL will ensure that the code will also not be installed in
the code table and jump table any more, to fix issues with non-local
control flow (i.e. catching a trap and reentering wasm), where we
could currently accidentally execute flooded code. It will also speed
up stepping over recursive calls enormously, since the recursive calls
don't run into the flooded breakpoints any more.

R=thibaudm@chromium.org

Bug: v8:10235
Change-Id: Ifae5e35c3242c95e1fe1a89a169ce874b818a288
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2152646Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67202}