Deploying libFuzzer-based harnesses

[kevin-valerio]

The goal of this PR is multiple.

• Fuzz any given libFuzzer harnesses that implement a correct LLVMFuzzerTestOneInput
• Compile ASAN/UBSAN version of the target
• Create a proper runner to execute inputs
• Generate coverage report for the C++ codebase
• Integrate CMPLOG into the target

In an ideal world, a user would just have to create a valid LLVMFuzzerTestOneInput and CMakeList.txt, execute cargo ziggy fuzz --asan --cpp, and the magic deployment should follow.

This is still WIP, as of the 15/04/2025, the ASAN/CMPLOG/target compilation works well, same for fuzzing. An example is given under the associated directory

ToDos:

• UBSAN
• Coverage report generation
• Minimizer
• Linking to LTO or not via the .config file
• Extra params for -D and ASAN_OPTIONS
• Using remote Ziggy and not local Ziggy in root_dir/Cargo.toml