.. to simplify logic within compiler.cc. GetOrCompileOptimized now only
returns Code object if the requested optimized Code object is available.

This change also required updating CompileLazy to install the
appropriate Code object before potentially calling CompileOptimized_*
runtime functions in order to satisfy the is_compiled precondition.

Bug: v8:12161
Change-Id: I991dbcc0ba8f3d635aa1e1f06e4cffd89e08a47b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3562978Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Jakob Linke <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79762}