make_async w run_in_threadpool wrapper for resolvers

[Mark90]

Todo:

• Compare performance of concurrent graphql queries with/without this change

Closes #628

[codspeed-hq]

CodSpeed Performance Report

Merging #1100 will not alter performance

_{Comparing 628-async-gql-option-2 (e5d7de1) with main (58b52b5)}

Summary

✅ 13 untouched

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.22%. Comparing base (58b52b5) to head (e5d7de1).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1100      +/-   ##
==========================================
+ Coverage   80.19%   80.22%   +0.03%     
==========================================
  Files         266      266              
  Lines       12848    12873      +25     
  Branches     1256     1256              
==========================================
+ Hits        10303    10328      +25     
  Misses       2265     2265              
  Partials      280      280              

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