fix: revert 63145e4 to fix stuck assessment > automated checks scanning

[karanbirsingh]

This reverts 63145e4, which introduced #2695. Details from Dan:

automated checks only indirectly renders the TestStepView via src\DetailsView\extensions\wait-for-all-requirements-to-complete.tsx; the test step view doesn't get mounted until after all the requirements complete, but the logic to start the visualizer was moved to the mount phase of the TestStepView"

This impacts the under-feature-flag reflow work, but is not intended to have other side effects

Pull request checklist

• Addresses an existing issue: #0000
• 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

[dbjorge]

Sanity checked fastpass (automated checks and tab stops), all ad-hoc tools, assessment (automated checks, manual + assisted + manual-auto-pass) cases without the reflow flag active, didn't see any issues. Approved pending PR build results.