--enable-pystats compile broken on main

[mdboom]

Bug report

Bug description:

Compiling with --enable-pystats is currently broken.

gcc -c -fno-strict-overflow -Wsign-compare -DNDEBUG -g -O3 -Wall    -std=c11 -Wextra -Wno-unused-parameter -Wno-missing-field-initializers -Wstrict-prototypes -Werror=implicit-function-declaration -fvisibility=hidden  -I./Include/internal -I./Include/internal/mimalloc  -I. -I./Include    -DPy_BUILD_CORE -o Python/ceval.o Python/ceval.c
In file included from ./Include/internal/pycore_interp.h:16,
                 from ./Include/internal/pycore_runtime.h:17,
                 from ./Include/internal/pycore_pystate.h:11,
                 from ./Include/internal/pycore_call.h:12,
                 from Python/ceval.c:7:
Python/ceval.c: In function ‘_PyEval_EvalFrameDefault’:
./Include/internal/pycore_code.h:291:26: error: implicit declaration of function ‘_Py_bit_length’; did you mean ‘Py_mp_length’? [-Werror=implicit-function-declaration]
  291 |             int bucket = _Py_bit_length(length >= 1 ? length - 1 : 0); \
      |                          ^~~~~~~~~~~~~~
Python/ceval.c:1049:5: note: in expansion of macro ‘OPT_HIST’
 1049 |     OPT_HIST(trace_uop_execution_counter, trace_run_length_hist);
      |     ^~~~~~~~

CPython versions tested on:

CPython main branch

Operating systems tested on:

Linux

Linked PRs

• gh-111652: Fix --enable-pystats build #111653