Expose lock operations from management `IModelsClient`

[GytisCepk]

Motivation

I have a desktop application where I want to query locks on the frontend.

Currently, my 2 options are:

• Call local backend (via IPC) so I could use authoring IModelsClient
• Construct HTTP calls myself without a client

Neither option is optimal.

Solution

Expose lock operations from management IModelsClient and not just from authoring.

I'm willing to inner-source this, but first, I'm curious, if there are any objections or concerns.