You can find a list of dependencies installed in Dataflow workers in . Dataflow workers will have a set of dependencies that will satisfy the requirements from setup.py.
Which bigquery library you are using? There is a google-cloud-bigquery==0.25.0 dependency, I am not sure where the 0.23.0 is coming from.
Workers do not pick up libraries from the client environment as part of the job submission. I am not sure how datalab UI integration works however you have a few options for installing any set of dependencies in the workers. Using requirements.txt is one of those options.