Revert of Turn StoreIC::Megamorphic into a builtin, get rid of the non-monomorphic-cache (patchset #5 id:80001 of https://codereview.chromium.org/1864703003/ )

Reason for revert:
[Sheriff] Check during mksnapshot:
https://build.chromium.org/p/client.v8/builders/V8%20Linux%20ASAN%20mipsel%20-%20debug%20builder/builds/5950/steps/compile/logs/stdio

Original issue's description:
> Turn StoreIC::Megamorphic into a builtin, get rid of the non-monomorphic-cache
>
> BUG=
>
> Committed: https://crrev.com/8764f87a3399ba433a4ce6f32161181c713af95c
> Cr-Commit-Position: refs/heads/master@{#35376}

TBR=mvstanton@chromium.org,hpayer@chromium.org,verwaest@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/1875033003

Cr-Commit-Position: refs/heads/master@{#35379}