[3.14] gh-142048: Fix quadratically increasing GC delays (gh-142051) (gh-142166)

The GC for the free threaded build would get slower with each collection due
to effectively double counting objects freed by the GC.
(cherry picked from commit eb892868b31322d7cf271bc25923e14b1f67ae38)

Co-authored-by: Kevin Wang <kevmo314@gmail.com>