[nova] Add ShardFilter to all regions
[nova] Add ShardFilter to all regions

We've put the sharding tags on all existing projects and keystone adds
the tags to newly-created ones. Therefore, we can roll out the
ShardFilter everywhere, which makes adding a new shard easier, as we
don't have to deploy nova to make it work.

sapcc/helm-charts,sapcc/helm-charts,sapcc/helm-charts,sapcc/helm-charts