[led] Inject debug_sleep into luciexe wrappers, too.
[led] Inject debug_sleep into luciexe wrappers, too.

R=yiwzhang

Bug: 1197300
Change-Id: Ia54d369b85cb16e11df9c89e8e61ed7565753dc8
Reviewed-on: https://chromium-review.googlesource.com/c/infra/luci/luci-go/+/2816298
Auto-Submit: Robbie Iannucci <40f3d43a28ebae3cb819288542e1c84d73d962d5@chromium.org>
Reviewed-by: Andrii Shyshkalov <a30c74fa30536fe7ea81ed6dec202e35e149e1fd@google.com>
Commit-Queue: Robbie Iannucci <40f3d43a28ebae3cb819288542e1c84d73d962d5@chromium.org>

luci/luci-go,luci/luci-go,luci/luci-go,luci/luci-go,luci/luci-go,luci/luci-go