mod/scmi_clock: SCMI Notification Enhancement

Current SCMI Notification which is implemented in SCMI layer has an inherent limitation that it doesn't support custom notification payload which is required when the agents have their own distinct identification of the resources, i.e. SCMI clocks.

The new implementation has moved the SCMI notification processing from SCMI to SCMI protocol layers so that each protocol can maintain and customize its own notification table and payload, respectively.

This MR implements only for SCMI-clk. The rest of the protocols would follow the same implementation in separate ticket/MR.