Removing sudo from virt env activation and adding a visible output

.github/workflows/tests.yml

@@ -26,7 +26,7 @@ jobs:
         sudo apt-get purge -y ansible
         sudo apt-get install -y python3-setuptools python3-pip python3-venv
         sudo python3 -m venv lintenv
-        sudo source lintenv/bin/activate
+        source lintenv/bin/activate && echo "Virtual environment activated"
         # This pinned ansible version should match teuthology's
         # requirements.txt.
         # And we choose an ansible-lint version to be compatible with this