R1:411331469af4

Apply namespace locking rules in Almanac

Summary:
Ref T10246. Ref T6741.

When you have a namespace like "phacility.net", require users creating services and devices within it to have edit permission on the namespace.

This primarily allows us to lock down future device names in the cluster, so instances can't break themselves once they get access to Almanac.

Test Plan:
- Configured a `phacility.net` namespace, locked myself out of it.
- Could not create new `stuff.phacility.net` services/devices.