Make the recursion limit workaround dependent on the aiida-core version

[agoscinski]

With aiida-core v2.8.0 we switched from nest-asyncio to greenlet and therefore do not need to dynamically increase the recursion limit anymore.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 86.66667% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 89.87%. Comparing base (4df7350) to head (36421b7).

Files with missing lines	Patch %	Lines
src/aiida_pythonjob/decorator.py	86.66%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #72      +/-   ##
==========================================
+ Coverage   89.82%   89.87%   +0.05%     
==========================================
  Files          22       22              
  Lines        1317     1324       +7     
==========================================
+ Hits         1183     1190       +7     
  Misses        134      134              

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