Add e2e test case for PR 9366

[hollycai05]

Thank you for contributing to Velero!

Please add a summary of your change

Add e2e test case for PR 9366:
Use hookIndex for recording multiple restore exec hooks

Does your change fix a particular issue?

Fixes #(issue)
#9366

Please indicate you've done the following:

• Accepted the DCO. Commits without the DCO will delay acceptance.
• Created a changelog file (make new-changelog) or comment /kind changelog-not-required on this PR.
• Updated the corresponding documentation in site/content/docs/main.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 60.64%. Comparing base (8b55592) to head (bbec46f).
⚠️ Report is 15 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9562      +/-   ##
==========================================
- Coverage   60.65%   60.64%   -0.01%     
==========================================
  Files         386      387       +1     
  Lines       36477    36518      +41     
==========================================
+ Hits        22124    22148      +24     
- Misses      12771    12782      +11     
- Partials     1582     1588       +6     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.