Revert of [api] Restrict Template::Set to take templates or primitive values (patchset #1 id:1 of https://codereview.chromium.org/1839983002/ )

Reason for revert:
Breaks node.js

Original issue's description:
> [api] Restrict Template::Set to take templates or primitive values
>
> Embedders that passed in non-primitive values should either use
> getters/setters (templates) or install a native data property,
> otherwise, the values would all result in cross-context leaks
>
> BUG=none
> R=verwaest@chromium.org
> LOG=y
>
> Committed: https://crrev.com/eebdee8eafa97849cc70c25f3fecf1b075bac248
> Cr-Commit-Position: refs/heads/master@{#35244}

TBR=verwaest@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=none

Review URL: https://codereview.chromium.org/1860003002

Cr-Commit-Position: refs/heads/master@{#35264}