`test_no_leaks` fails on macOS `x86_64` PyPy 3.9

In adding PyPy support, it was found that `test_no_leaks` failed on macOS `x86_64` ( https://github.com/conda-forge/python-blosc-feedstock/pull/55#issuecomment-2062080364 )

```python
======================================================================
FAIL: test_no_leaks (blosc.test.TestCodec)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/Users/runner/miniforge3/conda-bld/python-blosc_1713381825919/_test_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_p/lib/pypy3.9/site-packages/blosc/test.py", line 292, in test_no_leaks
self.assertFalse(leaks(compress), msg='compress leaks memory')
AssertionError: True is not false : compress leaks memory

----------------------------------------------------------------------
```

This happened in [this CI job]( https://dev.azure.com/conda-forge/feedstock-builds/_build/results?buildId=917315&view=logs&jobId=a8dee1cf-d17f-5cb0-b53f-4a93dfdbfb0c&j=a8dee1cf-d17f-5cb0-b53f-4a93dfdbfb0c&t=d9dbf137-9a7f-5666-c60c-9e1b2fc31445 ). Also for posterity here is the [attached log]( https://github.com/conda-forge/python-blosc-feedstock/files/15019965/azure_python-blosc-feedstock_20240417.6_osx_64_numpy1.22python3.9.____73_pypy_log.txt )