Bypass mscompatdb wrapper load for M12

[aaf2tbz]

Summary

• route M12 game launches through the direct Wine binary instead of the metalsharp-wine wrapper
• preserve the wrapper runtime env M12 needs while intentionally not injecting MS_ROOT, which is what activates the mscompatdb Unix sidecar
• keep the existing dxmt-m12 routing and mscompatdb=d override visible in dry-run diagnostics

Verification

• cargo test --manifest-path app/src-rust/Cargo.toml mtsp::launcher::tests::
• git diff --check
• local runtime probe: direct Wine without MS_ROOT no longer loads mscompatdb.so; the current Wine binary still prints bare mscompatdb: not found at startup even with WINEDEBUG=-all