Revert of [es2015] Precompute the descriptive string for symbols. (patchset #3 id:40001 of https://codereview.chromium.org/2900703002/ )

Reason for revert:
Speculative revert for:
https://build.chromium.org/p/client.v8/builders/V8%20Win32%20-%20debug/builds/8901

Original issue's description:
> [es2015] Precompute the descriptive string for symbols.
>
> Previously the String constructor and the Symbol.prototype.toString
> methods had to compute the descriptive string for a Symbol on the fly,
> which can produce a lot of garbage when this happens a lot, i.e. when
> the String representation of a Symbol is used often. Now instead of
> doing this on-demand we can just do it upfront when creating the Symbol.
>
> That way we also ensure that we won't throw an exception when accessing
> the descriptive string of a Symbol, due to potential String length
> overflow, but have the exception during Symbol creation upfront, which
> is a lot less surprising behavior.
>
> BUG=v8:6278,v8:6344,v8:6350
> TBR=mlippautz@chromium.org
> R=ishell@chromium.org
>
> Review-Url: https://codereview.chromium.org/2900703002
> Cr-Commit-Position: refs/heads/master@{#45479}
> Committed: https://chromium.googlesource.com/v8/v8/+/e87573822e1c0c041c03f2b60599b0ab9256422f

TBR=ishell@chromium.org,mlippautz@chromium.org,bmeurer@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:6278,v8:6344,v8:6350

Review-Url: https://codereview.chromium.org/2903533002
Cr-Commit-Position: refs/heads/master@{#45483}