[Stepper] - Remove `goTo...` methods from Stepper

[macandcheese]

Description

This pattern of using methods (goToStep(),endStep(),startStep(),nextStep(),prevStep()) to navigate steps is an outdated pattern - we should refactor the component to no longer use / accept these methods (internally as well as externally). The public story should be to assign / adjust the selected property as needed on the desired stepper-item.

Proposed Advantages

Bring the stepper and stepper-item component in line with more recent patterns.

Which Component

Stepper / Stepper Item

Relevant Info

No response

[jcfranco]

I'm not sure I agree with this request. What you're proposing means that the user would need to store references to all items, or query the DOM for them, and manage selection as the user interacts with the app. Is this correct?

[macandcheese]

This issue was opened as the result of a Teams discussion or issue follow up (can’t remember), where it was noted this was kind of a one off pattern.

If it’s fine to keep them around we can disregard this and maybe add a guideline around it.