This makes the WasmCompileLazy builtin push a new WASM_COMPILE_LAZY
frame type. We can thereby remove the workaround to return a relocated
instance from the underlying runtime function. It also removes the last
remaining embedded code objects from {WasmCode} objects.

R=titzer@chromium.org

Change-Id: Ic9c3f59339e8d7bed53ea0ed70ef50dfe640f1c6
Reviewed-on: https://chromium-review.googlesource.com/1073455
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Ben Titzer <titzer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53405}