Add a radix tree based memory map to track in-use obmalloc arenas. Use to

replace the old implementation of address_in_range(). The radix tree

approach makes it easy to increase pool sizes beyond the OS page size.

Boosting the pool and arena size allows obmalloc to handle a significantly

higher percentage of requests from its ultra-fast paths.

It also has the advantage of eliminating the memory unsanitary behavior of

the previous address_in_range(). The old address_in_range() was marked with

the annotations _Py_NO_SANITIZE_ADDRESS, _Py_NO_SANITIZE_THREAD, and

_Py_NO_SANITIZE_MEMORY. Those annotations are no longer needed.

To disable the radix tree map, set a preprocessor flag as follows:

`-DWITH_PYMALLOC_RADIX_TREE=0`.

Co-authored-by: Tim Peters <tim.peters@gmail.com>