[devserver] update stage_telemetry call.

Removes the call to stage autotest out of the devserver code
and moves it to autotest.

BUG=chromium:438278
TEST=local telemetry run.
CQ-DEPEND=CL:233040
Change-Id: I1f13ed28fa1571bd731ce9ae6684579e5aa055d8
Reviewed-on: https://chromium-review.googlesource.com/233036
Reviewed-by: Achuith Bhandarkar <achuith@chromium.org>
Reviewed-by: Ilja Friedel <ihf@chromium.org>
Commit-Queue: Simran Basi <sbasi@chromium.org>
Tested-by: Simran Basi <sbasi@chromium.org>
1 file changed