Goal

As a user, I want to be able to inspect the block limits QEMU uses for a given block node so that I can better debug performance issues and configure VMs more optimally.

Acceptance criteria

• Verify that it is possible to query the block limits of a node in QMP
• Verify that qemu-img info provides an option to display the block limits of the node for the specified image. This should not be enabled by default to avoid cluttering the default output with information that is not relevant/already known to the user in most cases.
• Verify that the returned values are correct in both cases