cva6/uvm: update the AXI interface and parameters of the CVA6

Created by: cfuguet

This PR is related to CVA6 PR (https://github.com/openhwgroup/cva6/pull/1223)

The modifications in the CVA6 repository remove redundant definitions of AXI parameters in the CVA6 core. AXI parameters are only passed through the top parameters and propagated.

Actual definition of AXI parameters must be performed at SoC level and pass during the CVA6 instantiation. This allows different instances of CVA6 in the same SoC to have different AXI parameters.

Because of this change in the CVA6 interface, we need to align CORE-V-VERIF testbenches dedicated to CVA6.

Thank you