fix: inline start over button

[pownkel]

Description of changes

Replace the "Start over" text in "use the start over button to scan the target page" with an inline button, as described in #3229:

This affects the "target changed" view in all fastpass pages, and the view before scanning for "automated checks" and "needs review."

Pull request checklist

• Addresses an existing issue: "Use the Start over button" is unclear now that the button can be hidden behind a ... menu #3229
• Ran yarn fastpass
• Added/updated relevant unit test(s) (and ran yarn test)
• Verified code coverage for the changes made. Check coverage report at: <rootDir>/test-results/unit/coverage
• PR title AND final merge commit title both start with a semantic tag (fix:, chore:, feat(feature-name):, refactor:). See CONTRIBUTING.md.
• (UI changes only) Added screenshots/GIFs to description above
• (UI changes only) Verified usability with NVDA/JAWS

[ferBonnin]

LGTM 👍
Have we tested the inline button reflows nicely?

[pownkel]

Have we tested the inline button reflows nicely?

Yep! It looks like this:

[lisli1]

LGTM