[BUG] UVMA core cntrl agent is not aware of H (hypervisor) extension

Created by: zchamski

Functionally incorrect behavior: the core cntrl cfg agent does not mark CSRs mtinst and mtval2 as unsupported in the absence of the H (hypervisor) extension. As a result, Spike tandem simulations of CVA6 consider these registers as implemented in RTL (incorrect behavior) while Spike reports them as not found (correct behavior).

The effect can be seen in tandem scoreboard checks.

Steps to Reproduce

Please provide:

URL to the branch that exhibits the issue: cva6 master@33ab2efa83454e5b4f90c2156863b47adb0c56ba
Command line: export DV_SIMULATORS=vcs-testharness SPIKE_TANDEM=1; bash verif/regress/smoke-tests.sh, target cv32a65x.
Logfile excerpt from verif/sim/out_2024-06-27/vcs-testharness_sim/rv32i-I-ADD-01.cv32a65x.log.iss, CSRs 34a (mtinst) and 34b (mtval2):

UVM_INFO /gitlab-runner/runner_riscv-public/builds/yD5zmwgi3/1/riscv-ci/cva6/verif/core-v-verif/lib/uvm_components/uvmc_rvfi_scoreboard/uvmc_rvfi_scoreboard_utils.sv(198) @ 12210: reporter [spike_tandem] 
CSR 341  Mismatch   [REF]: 0xffffffff8000031a [CORE]: 0x8000031a        
CSR 34a  not found  [REF]: 0x0                [CORE]: 0x0               
CSR 34b  not found  [REF]: 0x0                [CORE]: 0x0               
UVM_INFO /gitlab-runner/runner_riscv-public/builds/yD5zmwgi3/1/riscv-ci/cva6/verif/core-v-verif/lib/uvm_components/uvmc_rvfi_scoreboard/uvmc_rvfi_scoreboard_utils.sv(199) @ 12210: reporter [spike_tandem]                12210 | RVFI |        3 |      0 | 80000004 | 34202f73 | M | x0  | 00000000 | x2  | 00000000 | x30 | 000000000000000b | csrrs   t5, mcause, zero
UVM_ERROR /gitlab-runner/runner_riscv-public/builds/yD5zmwgi3/1/riscv-ci/cva6/verif/core-v-verif/lib/uvm_components/uvmc_rvfi_scoreboard/uvmc_rvfi_scoreboard_utils.sv(200) @ 12210: reporter [spike_tandem]                12210 | RVFI |        0 |      0 | 80000004 | 34202f73 | M | x0  | 00000000 | x2  | 00000342 | x30 | 000000000000000b | csrrs   t5, mcause, zero <- CORE

Additional context

The root cause of the incorrect behavior is the initialization of the unsupported_csr_ mask in file https://github.com/openhwgroup/core-v-verif/blob/master/lib/uvm_agents/uvma_core_cntrl/uvma_core_cntrl_cfg.sv which does NOT mark CSrs mtinst and mtval2 as unsupported if H extension is not present.
The discrepancy on the value of CSR 341 (mepc) is a false negative and is being addressed.