[3.14] GH-148726: Add heap_size to _gc_runtime_state#149025

sergey-miryanov wants to merge 2 commits intopython:3.14python/cpython:3.14from

sergey-miryanov:feat/gc-gen-3.14+heap_sizesergey-miryanov/cpython:feat/gc-gen-3.14+heap_sizeCopy head branch name to clipboard