PMM-12548 Slowlog as new MongoDB query source.

[JiriCtvrtka]

PMM-12548

Link to the Feature Build: SUBMODULES-0

[codecov]

Codecov Report

Attention: Patch coverage is 4.16667% with 115 lines in your changes missing coverage. Please review.

Project coverage is 43.63%. Comparing base (6042386) to head (0c17f11).
Report is 5 commits behind head on v3.

Files with missing lines	Patch %	Lines
.../inventory/add_agent_qan_mongodb_mongolog_agent.go	0.00%	43 Missing ⚠️
managed/services/management/mongodb.go	0.00%	23 Missing ⚠️
managed/services/converters.go	0.00%	16 Missing ⚠️
managed/services/agents/mongodb.go	0.00%	14 Missing ⚠️
admin/commands/list.go	0.00%	9 Missing and 1 partial ⚠️
admin/cmd/bootstrap.go	0.00%	5 Missing ⚠️
managed/services/agents/state.go	0.00%	2 Missing ⚠️
admin/commands/management/add_mongodb.go	0.00%	1 Missing ⚠️
managed/services/victoriametrics/prometheus.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##               v3    #3776      +/-   ##
==========================================
- Coverage   43.72%   43.63%   -0.10%     
==========================================
  Files         369      370       +1     
  Lines       44967    45031      +64     
==========================================
- Hits        19664    19651      -13     
- Misses      23615    23692      +77     
  Partials     1688     1688              

Flag	Coverage Δ
admin	11.38% <0.00%> (-0.14%)	⬇️
managed	45.10% <8.19%> (-0.08%)	⬇️
vmproxy	73.45% <ø> (ø)

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