[wrapper-bbagent] Add wrapper support to bbagent
[wrapper-bbagent] Add wrapper support to bbagent

Bug: 1094754
Change-Id: Ieef661053d115db9432600d086bbc150f93e4a20
Reviewed-on: https://chromium-review.googlesource.com/c/infra/luci/luci-go/+/3427799
Reviewed-by: Yulan Lin <fa22fbbce8ab65d96ec9925b9c61a0c0692eb649@google.com>
Reviewed-by: Robbie Iannucci <40f3d43a28ebae3cb819288542e1c84d73d962d5@chromium.org>
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