[resultui] Set 'make up-dev-resultui' to upload to user-specific version.
[resultui] Set 'make up-dev-resultui' to upload to user-specific version.

This CL sets the uploaded service address to
<username>-dot-resultui-dot-luci-milo-dev.appspot.com.

Change-Id: Ieb219ce9cadfc84620f22f4cce178bb6b42addc8
Reviewed-on: https://chromium-review.googlesource.com/c/infra/luci/luci-go/+/2168974
Auto-Submit: Joey Scarr <e609d4c46132d2dea94acf5ac2b9f229ffc1f245@chromium.org>
Reviewed-by: Weiwei Lin <968518a24f41fef00b747498600e52b792d06ae0@google.com>
Commit-Queue: Joey Scarr <e609d4c46132d2dea94acf5ac2b9f229ffc1f245@chromium.org>

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