Restore HardwareTestSuite functionality

The `HardwareTestSuite` logic in `Robot.java` and `testPeriodic()` is currently disabled in favor of manual controls for IntakeArm tuning. Once the tuning is complete and the gains are hardcoded, we should remove the manual tuning controls from `testPeriodic()` and uncomment the `HardwareTestSuite` variables/scheduling to restore the automated hardware smoke testing on the Start button.

Start in Robot.java by reading the disabled HardwareTestSuite logic and the manual controls in testPeriodic(). After the IntakeArm tuning is complete and the gains are hardcoded, remove those manual controls and restore the HardwareTestSuite variables and scheduling. Done means automated hardware smoke testing runs from the Start button.

Written by the indexing model from the issue text.