Add driving actions for the MetaDrive simulator

[kevinchang73]

Describe the feature and motivation

Several driving actions (e.g., SetReverseAction, SetSpeedAction, SetVelocityAction, etc.) are not implemented for the MetaDrive simulator.

Additional context

Here’s a sample code snippet: using the MetaDrive model results in a NotImplementedError, whereas the Newtonian model works as expected.

param map = localPath('../maps/Town05.xodr')
model scenic.simulators.metadrive.model
#model scenic.simulators.newtonian.driving_model

EGO_MODEL = "vehicle.toyota.prius"

behavior EgoBehavior():
    take SetSpeedAction(1)

ego = new Car at (0, 0),
    with blueprint EGO_MODEL,
    with behavior EgoBehavior()

Issue Submission Checklist

• I checked the open and closed issues, forum, etc. and have not found any solution