tests/test_mies_nwb_pipeline_output.py: Avoid using the pkg_resources module

This is removed in python 3.12.

We can leverage the importlib.resources module introduced in python 3.9
instead.

Author: t-b

tests/test_mies_nwb_pipeline_output.py

@@ -5,13 +5,13 @@
 import os
 import ipfx.json_utilities as ju
 from ipfx.bin.run_pipeline import run_pipeline
-from pkg_resources import resource_filename
+import importlib.resources
 from dictdiffer import diff
 
 
-TEST_SPECIMENS_FILE = resource_filename(__name__, 'test_mies_nwb2_specimens.csv')
-
-test_specimens = pd.read_csv(TEST_SPECIMENS_FILE, sep=" ")
+ref = importlib.resources.files('ipfx') / '../tests/test_mies_nwb2_specimens.csv'
+with importlib.resources.as_file(ref) as path:
+    test_specimens = pd.read_csv(path, sep=" ")
 test_specimens_params = [tuple(sp) for sp in test_specimens.values]