This reverts commit 25d16574.

Reason for revert: breaks tree with new flakes. See, for example:

https://ci.chromium.org/p/v8/builders/ci/V8%20Linux%20-%20arm64%20-%20sim%20-%20MSAN/31169
https://ci.chromium.org/p/v8/builders/ci/V8%20Linux%20-%20arm64%20-%20sim/21895
https://ci.chromium.org/p/v8/builders/ci/V8%20Linux64%20TSAN%20-%20isolates/8490


Original change's description:
> [runtime] Improve handling of enumeration index on global dictionary
> 
> Bug: chromium:1056054
> Change-Id: Ie1f2da98bc54a2ad5189cbe2ee1686fe1ef7019a
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2079035
> Reviewed-by: Toon Verwaest <verwaest@chromium.org>
> Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
> Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
> Cr-Commit-Position: refs/heads/master@{#66504}

TBR=jkummerow@chromium.org,verwaest@chromium.org,seth.brenith@microsoft.com,victorgomes@chromium.org

Change-Id: I2baa48f6ed2b0b3e23b0d705b6a805d76ee4bb8f
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:1056054
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2080653Reviewed-by: Francis McCabe <fgm@chromium.org>
Commit-Queue: Francis McCabe <fgm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66505}