[tests] Simplify integration tests

[yurishkuro]

Description of the changes

• Minimize cross-function dependencies

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.19%. Comparing base (015c7fb) to head (e4e1ec9).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5409   +/-   ##
=======================================
  Coverage   95.19%   95.19%           
=======================================
  Files         346      346           
  Lines       16916    16916           
=======================================
  Hits        16104    16104           
  Misses        610      610           
  Partials      202      202           

Flag	Coverage Δ
badger_v1	10.30% <ø> (-0.17%)	⬇️
badger_v2	6.41% <ø> (ø)
cassandra-3.x	18.15% <ø> (-0.21%)	⬇️
cassandra-4.x	18.15% <ø> (-0.21%)	⬇️
elasticsearch-5.x	21.03% <ø> (-0.17%)	⬇️
elasticsearch-6.x	21.01% <ø> (-0.18%)	⬇️
elasticsearch-7.x	21.08% <ø> (-0.17%)	⬇️
elasticsearch-8.x	21.25% <ø> (-0.18%)	⬇️
grpc_v1	12.60% <ø> (ø)
grpc_v2	11.52% <ø> (-0.02%)	⬇️
kafka	9.97% <ø> (-0.21%)	⬇️
opensearch-1.x	21.12% <ø> (-0.18%)	⬇️
opensearch-2.x	21.12% <ø> (-0.18%)	⬇️
unittests	91.47% <ø> (ø)

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