Jemalloc 5.4.0

Jemalloc 5.4.0 was released with over 160 commits focused on technical debt reduction, including refactorings, bug fixes, and test improvements. The release introduces new features for managing pinned memory (such as HugeTLB pages), improved malloc statistics reporting, and compile-time optimizations for C++ allocations, while removing seven legacy tcache controls and fixing various bugs related to errno preservation and numeric overflow checks.