[ic-stepper, ic-step] step-connector not resizing on `aligned` prop change

## Summary of the bug
When ic-stepper is aligned `left` and then changed to aligned `full-width` the step-connector remains the same size.

## 🪜 How to reproduce
Tell us the steps to reproduce the problem:
1. Go to page: IcStepper playground
2. Click on: set to left aligned then full-width
3. See the error

## 📸 Screenshots or code
Left aligned

Full-width aligned

## 🧐 Expected behaviour
The step-connect should remain at 100% width after the change.

Start in the IcStepper playground and inspect the ic-stepper and ic-step components involved in the aligned prop change. Reproduce switching from left to full-width, then trace the step-connector sizing and verify that it becomes 100% width after the update.

Written by the indexing model from the issue text.