We should make HSv3 desc upload less frequent

Without checking the source code right now, HSDirs are supposed to cache HS descriptors for the inscribed lifetime (3 hours), and HSv3s are supposed to upload descriptors at a random time between 1 and 2 hours (see HS_SERVICE_NEXT_UPLOAD_TIME_MIN).

This makes HSv3s upload descriptors more frequently than needed. For example, we could increase this to upload descriptors between 2 and 2.9 hours, to make HSv3s less intense on the network.

Someone should double check the above logic and make sure it won't cause issues, and implement it.