This reverts commit 94456e5c.

Reason for revert: <INSERT REASONING HERE>

Original change's description:
> PPC/s390: Reland: [builtins] Move non-JS linkage builtins code objects into RO_SPACE
> 
> Port 855591a5
> 
> Original Commit Message:
> 
>     Reland of https://chromium-review.googlesource.com/c/v8/v8/+/1795358.
> 
>     [builtins] Move non-JS linkage builtins code objects into RO_SPACE
> 
>     Creates an allow-list of builtins that can still go in code_space
>     including all TFJ builtins and a small manual list that should be pared
>     down in the future.
> 
>     For builtins that go in RO_SPACE a Code object is created that contains an
>     immediate trap instruction. Generally these Code objects are still no
>     smaller than CODE_SPACE Code objects because of the Code object alignment
>     requirements. This will hopefully be addressed in a follow-up CL either by
>     relaxing them or removing the instruction stream completely.
> 
>     In the snapshot, this reduces code_space from ~152k to ~40k (-112k) and
>     increases by the same amount.
> 
> R=​delphick@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
> BUG=
> LOG=N
> 
> Change-Id: Ibd0713a17df9c873692553f2d57f4ba36bcdb342
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1893746
> Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
> Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
> Cr-Commit-Position: refs/heads/master@{#64704}

TBR=michael_dawson@ca.ibm.com,jyan@ca.ibm.com,joransiu@ca.ibm.com,delphick@chromium.org,miladfar@ca.ibm.com

Change-Id: I808a4220892dcfef66b4b9d90ab43bf403d2e9b0
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1894353Reviewed-by: Milad Farazmand <miladfar@ca.ibm.com>
Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#64705}