Try to fix inspector tests after removal of requirements.txt (#1967)

Author: rly

.github/workflows/run_inspector_tests.yml

@@ -33,8 +33,10 @@ jobs:
           python -m pip list
           git clone https://github.com/NeurodataWithoutBorders/nwbinspector.git
           cd nwbinspector
-          python -m pip install -r requirements.txt pytest
-          python -m pip install .  # this might install a pinned version of pynwb instead of the current one
+          python -m pip install pytest
+          python -m pip install ".[dandi]"  # this might install a pinned version of pynwb instead of the current one
+          # Download testing data and set config path
+          dandi download "https://gui-staging.dandiarchive.org/#/dandiset/204919"
           cd ..
           python -m pip uninstall -y pynwb  # uninstall the pinned version of pynwb
           python -m pip install .  # reinstall current branch of pynwb