Add checks for csisnapshot for vol_info population

[reasonerjt]

fixes #7874

Please indicate you've done the following:

• [X] Accepted the DCO. Commits without the DCO will delay acceptance.
• [X] 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 58.80%. Comparing base (2136679) to head (f61c8b9).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## release-1.14 #7875 +/- ## ============================================= Coverage 58.79% 58.80% ============================================= Files 345 345 Lines 28765 28771 +6 ============================================= + Hits 16913 16919 +6 Misses 10423 10423 Partials 1429 1429 ```

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