tox: run conda list before running pytest

tox.ini

@@ -13,7 +13,9 @@ deps =
     mkl;'arm' not in platform_machine
 
 [testenv]
-allowlist_externals = bash
+allowlist_externals =
+    bash
+    conda
 passenv=LAL_DATA_PATH
 conda_deps=openssl
 conda_channels=conda-forge
@@ -39,6 +41,8 @@ setenv =
     ; Tell the linker to look for shared libs inside the temporary Conda env.
     ; Needed to build BBHx's wheel, whick links to LAPACK.
     LIBRARY_PATH={envdir}/lib:{env:LIBRARY_PATH:}
+commands_pre =
+    conda list
 commands = pytest
 
 # The following are long running or may require