[logdog] Install standard gaemiddleware handlers to services
[logdog] Install standard gaemiddleware handlers to services

This enables the standard suite, including pprof.

Change-Id: I807421fb2f967d66977b17a19dfce07eb11e6fcf
Reviewed-on: https://chromium-review.googlesource.com/c/infra/luci/luci-go/+/1525524
Reviewed-by: Andrii Shyshkalov <a30c74fa30536fe7ea81ed6dec202e35e149e1fd@chromium.org>
Commit-Queue: Ryan Tseng <2190fe9a39b4920ec7bd59c848ec5cccd163056f@chromium.org>

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