cv: compare Tryjobs iff CQDaemon has triggered at least one Tryjob
cv: compare Tryjobs iff CQDaemon has triggered at least one Tryjob

R=robertocn

Bug: 1312255
Change-Id: Ie5f5d6982bc5965a96a3b9706b3f8650b3445983
Reviewed-on: https://chromium-review.googlesource.com/c/infra/luci/luci-go/+/3808048
Commit-Queue: Yiwei Zhang <50b2a565e2e78c292794832469a30ce5abc9959c@google.com>
Reviewed-by: Roberto Carrillo <b31161e510fbb37f8f70fdcde11530d2bae88470@chromium.org>
Auto-Submit: Yiwei Zhang <50b2a565e2e78c292794832469a30ce5abc9959c@google.com>

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