Revert of [test] Speculatively remove local-tests from archive (patchset #2 id:20001 of https://codereview.chromium.org/2643983002/ )

Reason for revert:
Breaks all windows bots:
https://build.chromium.org/p/client.v8/builders/V8%20Win32%20-%20debug/builds/6811

Original issue's description:
> [test] Remove local-tests from test262 archive and add to .isolate
>
> This might help fix the bots, which are broken in e.g.,
> https://build.chromium.org/p/tryserver.v8/builders/v8_mac_rel_ng_triggered/builds/14011
>
> The archive was added in order to transmit test262 tests more rapidly.
> It doesn't serve much of a purpose for local-tests. I naively added
> local-tests there out of symmetry. However, the BUILD.gn file does not
> regenerate an archive when files are only deleted and not added or
> changed. Since the performance concern is not present for the small
> volume of local-tests, this patch reverts to the more normal mechanism
> for sending over dependencies, with test262.isolate.
>
> R=adamk
>
> Review-Url: https://codereview.chromium.org/2643983002
> Cr-Commit-Position: refs/heads/master@{#42485}
> Committed: https://chromium.googlesource.com/v8/v8/+/9f545ea96f18b7036ac6ec43e359d63f41c3686a

TBR=adamk@chromium.org,littledan@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review-Url: https://codereview.chromium.org/2640223003
Cr-Commit-Position: refs/heads/master@{#42491}