This reverts commit a0aed87f.

Reason for revert: install goma client without update_hook

update_hook would disrupt current users, so start without update_hook,
which means goma cient in depot_tools user might need to
restart compiler_proxy manually when updated.
 https://docs.google.com/document/d/1pnwfkU6Rd9dRtQC0sg2vATmyRbkYWhnNUTD5k1PddC0/edit#

Original change's description:
> Revert "put goma client in depot_tools"
>
> This reverts commit 77780358.
>
> Reason for revert: AttributeError: 'GomaEnvPosix' object has no attribute 'RestartCompilerProxy'
>
> Original change's description:
> > put goma client in depot_tools
> >
> > install goma client cipd package in depot_tools.
> >
> > should not use $MYPATH/goma_ctl in cipd_bin_setup
> > since $MYPATH/goma_ctl uses cipd_bin_setup in itself,
> > so causing recursive calls.
> > invoke python to run .cipd/goma_ctl.py in cipd_bin_setup
> > instead.
> >
> > Bug: b/77663154
> > Change-Id: I9f82c766a886a2acfb899e3594e5f05a7b7bc75a
> > Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1866350
> > Reviewed-by: Edward Lesmes <ehmaldonado@chromium.org>
> > Reviewed-by: Dirk Pranke <dpranke@chromium.org>
> > Commit-Queue: Fumitoshi Ukai <ukai@chromium.org>
>
> TBR=sque@chromium.org,ukai@chromium.org,yyanagisawa@google.com,vadimsh@chromium.org,dpranke@chromium.org,tikuta@chromium.org,ehmaldonado@chromium.org,yekuang@google.com
>
> Change-Id: Ie050dfb524dd885634c31be829d733613e80aece
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Bug: b/77663154
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1872129
> Reviewed-by: Fumitoshi Ukai <ukai@chromium.org>
> Commit-Queue: Fumitoshi Ukai <ukai@chromium.org>

TBR=sque@chromium.org,ukai@chromium.org,yyanagisawa@google.com,vadimsh@chromium.org,dpranke@chromium.org,tikuta@chromium.org,ehmaldonado@chromium.org,yekuang@google.com


Bug: b/77663154
Change-Id: I8bb51631e4418ff63953099814bdb464128eb279
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1875982Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Commit-Queue: Fumitoshi Ukai <ukai@chromium.org>