Add a note about conda env to dev doc (#6592)

Author: NoureldinYosri

docs/dev/development.md

@@ -122,6 +122,9 @@ See the previous section for instructions.
 
     (When you later open another terminal, you can activate the virtualenv with `workon cirq-py3`.)
 
+    **Note:** Some highly managed or customized devices have configurations that interfere with `virtualenv`.
+    In that case, [anaconda](https://www.anaconda.com/) environments may be a better choice.
+
 3. Check that the tests pass.
 
     ```bash