fix(sharing): fix ShareAPI disabled for group list JSON deserialization to array

[tcitworld]

Similar to nextcloud/server#53503

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 65.62%. Comparing base (10d4cfe) to head (97ce69d).
Report is 7 commits behind head on main.

Additional details and impacted files

@@              Coverage Diff              @@
##               main    #4502       +/-   ##
=============================================
+ Coverage     11.02%   65.62%   +54.60%     
  Complexity      265      265               
=============================================
  Files           122       26       -96     
  Lines          5595      771     -4824     
  Branches       1213        0     -1213     
=============================================
- Hits            617      506      -111     
+ Misses         4856      265     -4591     
+ Partials        122        0      -122     

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