* uses tikv_jemallocator::Jemalloc as the global allocator (#20149)
https://github.com/solana-labs/solana/pull/16346
switched default allocator from jemalloc to system allocator, but that
has shown regressions in form of higher ram usage causing nodes go OOM:
https://discord.com/channels/428295358100013066/439194979856809985/890413193858539580
This commit sets jemalloc as the default allocator.
(cherry picked from commit 2cf081d863
)
# Conflicts:
# Cargo.lock
* removes backport merge conflicts
Co-authored-by: behzad nouri <behzadnouri@gmail.com>