[memprof] Use CallStackRadixTreeBuilder in the V3 format#94708

kazutakahirata merged 2 commits intollvm:mainllvm/llvm-project:mainfrom

kazutakahirata:memprof_v3_use_radix_treekazutakahirata/llvm-project:memprof_v3_use_radix_treeCopy head branch name to clipboard