[cipd] Bump the request timeout for /internal/... routes.
[cipd] Bump the request timeout for /internal/... routes.

Some CIPD packages takes more than (default) 10m to verify.

R=tandrii@chromium.org, 40f3d43a28ebae3cb819288542e1c84d73d962d5@chromium.org
BUG=1206017

Change-Id: I2077a07cc70458a37bf8a8db328ab213c26c0b10
Reviewed-on: https://chromium-review.googlesource.com/c/infra/luci/luci-go/+/2874944
Reviewed-by: Robbie Iannucci <40f3d43a28ebae3cb819288542e1c84d73d962d5@chromium.org>
Commit-Queue: Vadim Shtayura <9f116ddb1b24f6fc1916a676eb17161b6c07dfc1@chromium.org>

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