Stage 1A - Clean up motor controllers

[DylanB5402]

Which page?
https://frcsoftware.org/learning-course/stage1/stage1a/kitbot-drivetrain/#motor-controllers

What's wrong?
Inconsistencies with how we use variables for ids and in CTRE vs REV:
I think we should give the leader and follower their own variables in both versions

We should also make both leader in follower private here and in the solution:

[Spaceman113138]

We could just remove the variable for the leader id and use leadMotor.getCanId() when configuring the follower in CTRE code.

[DylanB5402]

That works too! Not married to any particular solution