controllers/version: Remove more spawn_blocking() fns

[Turbo87]

This pull requests gets rid of more spawn_blocking() fns by converting the code to async/await and taking advantage of diesel-async queries.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.19%. Comparing base (a1b9583) to head (80e44a8).
Report is 14 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #10001   +/-   ##
=======================================
  Coverage   89.19%   89.19%           
=======================================
  Files         295      295           
  Lines       30753    30757    +4     
=======================================
+ Hits        27429    27433    +4     
  Misses       3324     3324           

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