Add checks for csisnapshot for vol_info population

[reasonerjt]

fixes #7874

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]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 58.80%. Comparing base (2136679) to head (f61c8b9).

Additional details and impacted files

@@              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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