tracemalloc backend broken for memory_usage #402

from memory_profiler import memory_usage
memory_usage(lambda _: x, backend="tracemalloc")

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/ilangold/Projects/Theis/anndata/benchmarks/venv_mem/lib/python3.12/site-packages/memory_profiler.py", line 369, in memory_usage
    p = MemTimer(os.getpid(), interval, child_conn, backend,
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/ilangold/Projects/Theis/anndata/benchmarks/venv_mem/lib/python3.12/site-packages/memory_profiler.py", line 244, in __init__
    _get_memory(self.monitor_pid, self.backend, timestamps=self.timestamps,
  File "/Users/ilangold/Projects/Theis/anndata/benchmarks/venv_mem/lib/python3.12/site-packages/memory_profiler.py", line 212, in _get_memory
    raise RuntimeError(
RuntimeError: There is no access to source file of the profiled function