Remove CSI plugin in E2E test

[danfengliu]

Thank you for contributing to Velero!

Please add a summary of your change

Does your change fix a particular issue?

Fixes #7575

Please indicate you've done the following:

• [ ] Accepted the DCO. Commits without the DCO will delay acceptance.
• [ ] Created a changelog file or added /kind changelog-not-required as a comment on this pull request.
• [ ] Updated the corresponding documentation in site/content/docs/main.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 58.51%. Comparing base (22b9465) to head (a3bd26a). Report is 4 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #7710 +/- ## ========================================== - Coverage 58.51% 58.51% -0.01% ========================================== Files 343 343 Lines 28486 28487 +1 ========================================== Hits 16670 16670 - Misses 10401 10402 +1 Partials 1415 1415 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.