tests: introduce post synthesis simulation infrastructure
tests: introduce post synthesis simulation infrastructure

Signed-off-by: Paweł Czarnecki <be3a62494a976d1435cc0900bd9adf3fa1029787@antmicro.com>

chipsalliance/yosys-f4pga-plugins,SymbiFlow/yosys-f4pga-plugins,SymbiFlow/yosys-f4pga-plugins,chipsalliance/yosys-f4pga-plugins,SymbiFlow/yosys-f4pga-plugins