[MLIR] Mark `debug.callbacks` as inactive functions.

[erick-xanadu]

Context: debug.callbacks will always be inactive functions when taking the gradient of them.

Description of the Change: Change pyregistry to inactive_callback and mark all inactive_callbacks as inactive.

Benefits: Inactive callbacks are inactive.

Notes:

• Future PRs will make active_callbacks through specialization and will call inactive_callback as a primitive.
• Future PR will re-enable callbacks in gradients.

[sc-60496]