dim-testsuit: add target to install non-editable dev dependencies

work around issue on old pip: `ERROR: File "setup.py" not found. Directory cannot be installed in editable mode: /__w/dim/dim/dim`, we do not need editable anyway

.github/workflows/run_tests.yml

@@ -36,7 +36,7 @@ jobs:
       - name: Check out repository code
         uses: actions/checkout@v3
       - name: Prepare virtual environment
-        run: make install-dev
+        run: make install-test
         working-directory: dim-testsuite
       - name: Create DIM configuration directory
         run: mkdir -p /etc/dim

dim-testsuite/Makefile

@@ -49,6 +49,10 @@ install-dev: install-deps-local-editable
 	${VPIP} install -r ../dim/requirements-dev.txt
 	${VPIP} install -r ../ndcli/requirements-dev.txt
 
+install-test: install
+	${VPIP} install -r ../dim/requirements-dev.txt
+	${VPIP} install -r ../ndcli/requirements-dev.txt
+
 db-clear:
 	FLASK_APP=${FLASK_APP} ${VDIR}/bin/flask db clear