[logdog] Initiate Cloud Logging client with CloudOAuthScopes
[logdog] Initiate Cloud Logging client with CloudOAuthScopes

Bug: 1164124
Change-Id: I3c48067656d016f23e74923a06db8d4ec55f1eca
Reviewed-on: https://chromium-review.googlesource.com/c/infra/luci/luci-go/+/2944195
Reviewed-by: Vadim Shtayura <9f116ddb1b24f6fc1916a676eb17161b6c07dfc1@chromium.org>
Commit-Queue: Scott Lee <1dcb292530f82960316cb3d87cd67c3f212b79cb@chromium.org>

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