test: [M3-7496] - Add test for Proxy user -> Parent account token expiration prompt

[jdamore-linode]

Description 📝

Adds a test to confirm the flow when a proxy user attempts to switch back to their parent account when their parent account auth token has expired.

Changes 🔄

• Adds Proxy -> Parent expiration flow test
• Adds missing imports to factories index (and alphabetizes the imports)
• Cleans up Cypress auth by removing invalid local storage entries

How to test 🧪

yarn cy:run -s "cypress/e2e/core/parentChild/token-expiration.spec.ts

(Also recommend using cy:debug so you can observe the flow in action, in case there are any mistakes)

[github-actions]

Coverage Report: ✅
Base Coverage: 81.72%
Current Coverage: 81.72%

[mjac0bs]

Thanks, Joe!

[jaalah]

Thanks for capturing this use-case in our test, albeit hopefully it's never an issue!