Enable to generate legacy MC tests for the fuzzer.

[Rot127]

Your checklist for this pull request

• [x] I've documented or updated the documentation of every API function and struct this PR changes.
• [x] I've added tests that prove my fix is effective or that my feature works (if possible)

Detailed description

Until we have time to tackle https://github.com/capstone-engine/capstone/issues/2454 we can also generate the legacy MC test files for now. They are still used by the fuzzer and we should not loose fuzzing coverage for new modules.

Test plan

added

Closing issues

...