Revert "client: enable isolated everywhere again"
Revert "client: enable isolated everywhere again"

This reverts commit eb5723dde683037607f9c1fcc99e6142e8db3198.

Reason for revert: profiles were taken https://crbug.com/1045281#c34

Original change's description:
> client: enable isolated everywhere again
> 
> This is to take heap profiling in failing tasks.
> 
> Bug: 1045281
> Change-Id: Ia0a021bf6d941d6a32b28c33bb875e33c41b5a7e
> Reviewed-on: https://chromium-review.googlesource.com/c/infra/luci/luci-py/+/2217985
> Commit-Queue: Junji Watanabe <aaef61ef98ffea505db831f310be2a0eb8492537@google.com>
> Auto-Submit: Takuto Ikuta <71927f930fca81015e0f496c65cd126ab1a692e3@chromium.org>
> Reviewed-by: Junji Watanabe <aaef61ef98ffea505db831f310be2a0eb8492537@google.com>

TBR=71927f930fca81015e0f496c65cd126ab1a692e3@chromium.org,aaef61ef98ffea505db831f310be2a0eb8492537@google.com,yekuang@google.com,infra-scoped@luci-project-accounts.iam.gserviceaccount.com

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 1045281
Change-Id: I850c6b169b5d6f10ce80e41cb02241292464661e
Reviewed-on: https://chromium-review.googlesource.com/c/infra/luci/luci-py/+/2223878
Auto-Submit: Takuto Ikuta <71927f930fca81015e0f496c65cd126ab1a692e3@chromium.org>
Reviewed-by: Junji Watanabe <aaef61ef98ffea505db831f310be2a0eb8492537@google.com>
Commit-Queue: Junji Watanabe <aaef61ef98ffea505db831f310be2a0eb8492537@google.com>

luci/luci-py,luci/luci-py,luci/luci-py,luci/luci-py