Run yosys and plugin with address sanitizer

Running the tests with address sanitizer ( clang doc: https://clang.llvm.org/docs/AddressSanitizer.html ; should be similar for gcc/clang) will help finding some issues early.

It does result in somewhat slower binaries (but _much_ less so than e.g. valgrind), so the CI machines will have to work harder, but any findings here will well offset the engineering time attempting to find a head-scratching issue later.