PMM-13095 Remove trimming of slowlog query IDs.

[JiriCtvrtka]

PMM-13095

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 71.42857% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 44.33%. Comparing base (9209769) to head (b70b7b9).

Files	Patch %	Lines
agent/agents/mysql/slowlog/slowlog.go	71.42%	1 Missing and 1 partial :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##               v3    #2984      +/-   ##
==========================================
- Coverage   44.36%   44.33%   -0.04%     
==========================================
  Files         368      368              
  Lines       35327    35333       +6     
==========================================
- Hits        15674    15666       -8     
- Misses      18042    18055      +13     
- Partials     1611     1612       +1     

Flag	Coverage Δ
agent	52.59% <71.42%> (-0.13%)	:arrow_down:

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[JiriCtvrtka]

I kept MD5 hashing and not switched for SHA etc since it is ideal length (32 chars) without trimming and this corresponds with Perfschema MySQL DIGEST (query ID).