Install entire [devel] so we install psutil etc

Taken from 4fd1be9
which back then failed to test on windows... may be this time would be
better. But the main goal is to get psutil to get "filesystems" in hte
WTF output to troubleshoot datalad/datalad#6901

.github/workflows/template/build-{{ostype}}.yaml.j2

@@ -719,9 +719,9 @@ jobs:
             commitish="${{ matrix.version }}"
           fi
           python -m pip install --upgrade pip
-          pip install git+https://github.com/datalad/datalad@${commitish}
+          pip install datalad[devel]@git+https://github.com/datalad/datalad@${commitish}
 
-      - name: Install nose et al (just in case!)
+      - name: Install pytest et al (just in case!)
         run: pip install nose pytest vcrpy mock
 
       - name: WTF!?