ttq: use gax-go/v2
ttq: use gax-go/v2

Change-Id: I8ac88fed8d801d4c79703728fd41487a2e1b314d
Reviewed-on: https://chromium-review.googlesource.com/c/infra/luci/luci-go/+/2322567
Commit-Queue: Vadim Shtayura <9f116ddb1b24f6fc1916a676eb17161b6c07dfc1@chromium.org>
Reviewed-by: Vadim Shtayura <9f116ddb1b24f6fc1916a676eb17161b6c07dfc1@chromium.org>
Auto-Submit: Takuto Ikuta <71927f930fca81015e0f496c65cd126ab1a692e3@chromium.org>

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