This moves the responsibility of preparing full-codegen code with
deoptimization support into the backends. This avoids generating such
code when optimization can be done directly from existing bytecode.

R=bmeurer@chromium.org
BUG=v8:4280
LOG=n

Review URL: https://codereview.chromium.org/1883403002

Cr-Commit-Position: refs/heads/master@{#35517}