test specifying privilege modes in simulation in riscv-dv

[wsipak]

This is a draft to test changes in riscv-dv https://github.com/chipsalliance/riscv-dv/pull/984

[github-actions[bot]]

Links to coverage and verification reports for this PR (#197) are available at https://chipsalliance.github.io/Cores-VeeR-EL2/