JSFunctions with an attached InterpreterEntryTrampoline should also be
reset to CompileLazy, but this was recently broken by
https://crrev.com/c/2345966.

This CL introduces a new JSFunction::CanDiscardCompiled helper to
mirror SFI::CanDiscardCompiled, and uses it during serialization.

Bug: v8:10869
Change-Id: I176b77278d2d40d34db671638232faec4dda1d9c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2390145Reviewed-by: Mythri Alle <mythria@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69689}