test(e2e): add tests for the progress reset flow

[huyenltnguyen]

Checklist:

• I have read and followed the contribution guidelines.
• I have read and followed the how to open a pull request guide.
• My pull request targets the main branch of freeCodeCamp.
• I have tested these changes either locally on my machine, or GitPod.

When I was working on #54542, I found that we don't have tests for the progress reset flow. But adding tests for it requires some code cleanup so I decided to split the work to a separate PR.

This PR:

• Renames the existing reset-modal.spec.ts to challenge-reset-modal.spec.ts
  • We have two reset modals, both are namedreset-modal.tsx, but one is for resetting the code of a challenge and one is for resetting all progress
• Adds progress-reset-modal.spec.ts
• Removes the Cypress test for the progress reset modal
• Removes some assertions from a test in settings.spec.ts since they are redundant

[naomi-lgbt]

Nice!