[cv] adjust retries for Gerrit-related TQs.
[cv] adjust retries for Gerrit-related TQs.

* increase delay before retrying an individual CL refresh.
  The stale Gerrit data is unlike to disappear quickly.
  * don't retry on pathological CLs for more than a day.

* increase delay before retrying a Gerrit poll.
  * don't retry on pathological LUCI projects CLs for more than an hour.

R=qyearsley, yiwzhang

Change-Id: I1495db845f894d9353e4f1fce67927697a016032
Reviewed-on: https://chromium-review.googlesource.com/c/infra/luci/luci-go/+/2886929
Commit-Queue: Andrii Shyshkalov <a30c74fa30536fe7ea81ed6dec202e35e149e1fd@google.com>
Auto-Submit: Andrii Shyshkalov <a30c74fa30536fe7ea81ed6dec202e35e149e1fd@google.com>
Reviewed-by: Yiwei Zhang <50b2a565e2e78c292794832469a30ce5abc9959c@google.com>

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