Instead of replacing the array with an empty one after resuming, overwrite
contents with a new Oddball.

This will simplify the work to be done by the bytecode graphbuilder and
potentially allow for more optimization.

(For full-codegen generators, nothing changes.)

BUG=v8:4907
LOG=n

Review-Url: https://codereview.chromium.org/1923253002
Cr-Commit-Position: refs/heads/master@{#35872}