fix memory leaks; add memory sanitizer

[idkakorin]

Summary

This PR adds support for AddressSanitizer (ASan) in the GENIE build system and fixes several memory-related issues uncovered during testing.

Changes

• Added a new --enable-asan configure option
• Propagated sanitizer flags (-fsanitize=address -fno-omit-frame-pointer) to both compilation and linking stages
• Updated multiple Makefile targets to ensure sanitizer flags are consistently applied when building shared libraries
• Fixed several memory issues (including leaks) identified with ASan, including leaks in TuneId

Notes

• ASan support is intended for debugging and development builds
• Leak detection may be noisy due to external dependencies (e.g. ROOT), so it can be optionally disabled via ASAN_OPTIONS=detect_leaks=0
• No impact on default builds unless explicitly enabled

Motivation

The changes improve debugging capabilities and help identify memory safety issues (e.g. use-after-free, leaks) that are otherwise difficult to trace with standard tools. In particular, enabling ASan allowed detection of memory leaks in TuneId.