R1:d2df3064bcc3

Allow Almanac services to be locked

Summary:
Fixes T6741. This allows Almanac services to be locked from the CLI. Locked services (and their bindings, interfaces and devices) can not be edited. This serves two similar use cases:

- For normal installs, you can protect cluster configuration from an attacker who compromises an account (or generally harden services which are intended to be difficult to edit).
- For Phacility, we can lock externally-managed instance cluster configuration without having to…