sbuffer: response forward mask and data in the next clock cycle

load/store: split memory violation checking into two cycles

ci: add coremark test

Ifu register naming

dtlb: response at the next cycle after req.fire

fix a bug affecting ras performance

Added scripts to remove coverage statistics of print and assert.

1. filter out unnecessary coverage statistics
python3 scripts/coverage/coverage.py input.v output.v
2. re calculate the coverage statistics
python3 scripts/coverage/statistics.py output.v

frontend: include icache

Decode: refractor Decode Unit