Update attribute names in Rust, Python and ROS

[alphaville]

Some attributes are named differently in Rust, Python and ROS. For example, the same property is called delta_y_norm_over_c in Rust, f1_infeasibility in Python and infeasibility_f1 in ROS. We should try to use the same variable names everywhere.

[davidrusu]

Another example, sometimes we use solver other times we use optimizer