Fix transaction depending on server type

[art049]

Continuing the initial work done in #89 by @Olegt0rr .

Fixes #86
Fixes #87 (added it here as it interfered with the implementation)

[codecov]

Codecov Report

Merging #117 (dffa91d) into master (7a8430c) will decrease coverage by 0.25%.
The diff coverage is 81.08%.

@@             Coverage Diff             @@
##            master     #117      +/-   ##
===========================================
- Coverage   100.00%   99.74%   -0.26%     
===========================================
  Files           38       38              
  Lines         2723     2760      +37     
  Branches       178      187       +9     
===========================================
+ Hits          2723     2753      +30     
- Misses           0        4       +4     
- Partials         0        3       +3     

Flag	Coverage Δ
tests-3.6-4-standalone	99.01% <59.45%> (-0.70%)	⬇️
tests-3.6-4.2-standalone	99.01% <59.45%> (-0.70%)	⬇️
tests-3.6-4.4-standalone	99.01% <59.45%> (-0.70%)	⬇️
tests-3.7-4-standalone	98.82% <59.45%> (-0.69%)	⬇️
tests-3.7-4.2-standalone	98.82% <59.45%> (-0.69%)	⬇️
tests-3.7-4.4-standalone	98.82% <59.45%> (-0.69%)	⬇️
tests-3.8-4-replicaSet	97.46% <62.16%> (-0.48%)	⬇️
tests-3.8-4-standalone	98.76% <59.45%> (-0.69%)	⬇️
tests-3.8-4.2-sharded	97.46% <62.16%> (-0.48%)	⬇️
tests-3.8-4.2-standalone	98.76% <59.45%> (-0.69%)	⬇️
tests-3.8-4.4-standalone	98.76% <59.45%> (-0.69%)	⬇️
tests-3.9-4-standalone	98.65% <59.45%> (-0.68%)	⬇️
tests-3.9-4.2-standalone	98.65% <59.45%> (-0.68%)	⬇️
tests-3.9-4.4-standalone	98.65% <59.45%> (-0.68%)	⬇️

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Impacted Files	Coverage Δ
odmantic/engine.py	96.25% <77.41%> (-3.75%)	⬇️
tests/integration/test_engine.py	100.00% <100.00%> (ø)

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[github-actions]

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