Use importlib to get version of pangeo-forge-recipes

Let's not parse output of pip list.

tests/conftest.py

@@ -4,6 +4,7 @@
 import socket
 import subprocess
 import tempfile
+from importlib.metadata import version
 
 import pytest
 
@@ -63,10 +64,7 @@ def minio(local_ip):
 def recipes_version_ref():
     # FIXME: recipes version matrix is currently determined by github workflows matrix
     # in the future, it should be set by pangeo-forge-runner venv feature?
-    pip_list = subprocess.check_output("pip list".split()).decode("utf-8").splitlines()
-    recipes_version = [
-        p.split()[-1] for p in pip_list if p.startswith("pangeo-forge-recipes")
-    ][0]
+    recipes_version = version("pangeo-forge-recipes")
     # the recipes_version is a 3-element semantic version of form `0.A.B` where A is either minor
     # version `9` or `10`. the test feedstock (pforgetest/gpcp-from-gcs-feedstock) has tags for
     # each of these minor versions, of the format `0.A.x`, so we translate the installed version