Test integration of PartitionAlloc/HardenedPartitionAlloc in Tor Browser
PartitionAlloc/HardenedPartitionAlloc (https://github.com/struct/HardenedPartitionAlloc) have some interesting security properties we like to use (see: #20998 (moved) for a similar ticket wrt jemalloc). We should try to test them and compare them to jemalloc with partitioning enabled.