TB updates and fixes

Created by: XavierAubert

This PR updates includes those changes from @dd-vaibhavjain :

• Core hash to latest at the time of PR
• add rvviRefMetricGet to solve core-v-verif issue https://github.com/openhwgroup/core-v-verif/issues/2015
• Add param for trace2api ON_MISMATCH_RECONVERGE
• Update mk/README to add desc for TEST_CFG_FILE

FIX for simd and hwloop test issues:

• fix SIMD UIMM case for update_imm_str
• update imm randomization for cv32e40p_inst type
• Fix constraints issues in hwloop tests for setupi instructions:
• This is done by simplifying constraints and and fix issues with cv.setupi, resereved_rd.
• Add checks to make sure number random generated instructions never underflow due to constraints