PmpAssert - Add "uvm_error"

Created by: silabs-robin

This PR adds uvm_error to PMP assertions, so that the UVM error system can pick up failures in sim.

This change does not include functional changes so I only tested that formal still runs and that hello world still passes.

(Also touching "clic_interrupt_assert" and "rvfi_assert" because there were a few missing uvm_error there too.)