Improve riscv-dv tests in CI

[mkurc-ant]

This PR fixes several issues with riscv-dv tests in CI:

• added generation of most of the tests available in riscv-dv
• the riscv-dv test matrix is built directly from testlist.yaml
• separated code generation and test running stage from the makefile for riscv-dv
• fixed issues around code patching for VeeR that mitigates delayed writes not appearing in execution logs

[github-actions[bot]]

Links to coverage and verification reports for this PR (#122) are available at https://chipsalliance.github.io/Cores-VeeR-EL2/

[mkurc-ant]

Superseeded by https://github.com/chipsalliance/Cores-VeeR-EL2/pull/117