This reverts commit 2de2d3dc.

Reason for revert: https://ci.chromium.org/p/v8/builders/ci/V8%20Mac64%20GC%20Stress/11982?

Original change's description:
> [runtime] Amortize descriptor array growing for fast-mode prototypes
> 
> This avoids an O(n^2) algorithm that creates an equal amount of garbage.
> Even though the actual final descriptor array might be a little bigger,
> it reduces peak memory usage by allocating less.
> 
> Bug: b:148346655
> Change-Id: I984159d36e9e0b37c19bc81afc90c94c9a9d168a
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2135728
> Commit-Queue: Toon Verwaest <verwaest@chromium.org>
> Reviewed-by: Igor Sheludko <ishell@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#67031}

TBR=ishell@chromium.org,verwaest@chromium.org

Change-Id: I366141f1dbba62ff268df7ef625cc318f8423818
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: b:148346655
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2139212Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Commit-Queue: Nico Hartmann <nicohartmann@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67032}