uWGI was generating warnings about being unable to find plugin files we
specify. To fix this, I've added uwsgi-python3 to the list of Alpine
packages we install in the container specified the plugins directory in
the uWSGI config. The updated uWSGI ConfigMap has been applied to the
staging cluster, which eliminated the warning about the logfile plugin.
The remaining warning about the python3 plugin will be eliminated once
the new container built by this branch is deployed.
Updates the K8s config to enable extended uWSGI JSON logging again. This
commit updates the name of the ConfigMap for the uWSGI config to avoid
confusion.
