Integrate experimental SSA CFG codegen with OSS-Fuzz

[r0qs]

This PR introduces a new differential fuzzer for the new codegen pipeline. It compares the bytecode generated by the Via-IR and SSA CFG pipelines using HEVM. Still working in progress though. There may be better ways that we can accomplish that.

Additionally, the PR includes several minor fixes on top of the ssaCfgCodegen branch, which can be cherry-picked while this still a drafft. Please, take a look at them @clonker. Note that this PR is on top of that branch though ;)

Please note that the changes to the OSS-Fuzz image will need to be mirrored in the Google OSS-Fuzz Dockerfile in order to successfully run the fuzzers on the Google OSS-Fuzz platform.

To test it locally, run:

docker build --force-rm -t solidity-ossfuzz-local -f scripts/docker/buildpack-deps/Dockerfile.ubuntu.clang.ossfuzz .
docker run -v `pwd`:/src/solidity -ti solidity-ossfuzz-local /src/solidity/scripts/ci/build_ossfuzz.sh
docker run -v `pwd`:/src/solidity -ti solidity-ossfuzz-local /src/solidity/build_ossfuzz/test/tools/ossfuzz/yul_proto_diff_ssa_cfg_ossfuzz

Note: I didn't bump the ossfuzz image version on the dockerfile yet, because I still have some issues building the most recent version of the ssaCfgCodegen branch locally.