[dv] Update cove.cfg to remove pins_if coverage
[dv] Update cove.cfg to remove pins_if coverage

pins_if is used in tlul_assert which is binded to dut, should remove
pins_if in coverage

lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan