Change generative IRL bandit tests to new paradigm
Change generative IRL bandit tests to new paradigm

agentmodels/webppl-agents,agentmodels/webppl-gridworld,agentmodels/webppl-gridworld,agentmodels/webppl-gridworld,jsalvatier/webppl-agents,jsalvatier/webppl-agents,jsalvatier/webppl-agents