Update flogger-system-backend to 0.7.4

[labianchin]

Released a long time ago: https://github.com/google/flogger/releases/tag/flogger-0.7.4 / google/flogger@flogger-0.7.3...flogger-0.7.4

Also aligned with version from hadoop-connectors/gcsio: https://github.com/GoogleCloudDataproc/hadoop-connectors/blame/757c0853720a6ff4216d706063ca3ab44a9588ba/pom.xml#L94

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[codecov]

Codecov Report

Merging #28585 (e01b465) into master (a0d014a) will increase coverage by 0.01%.
Report is 83 commits behind head on master.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #28585      +/-   ##
==========================================
+ Coverage   72.23%   72.24%   +0.01%     
==========================================
  Files         684      684              
  Lines      101071   101071              
==========================================
+ Hits        73004    73015      +11     
+ Misses      26489    26478      -11     
  Partials     1578     1578              

Flag	Coverage Δ
python	82.82% <ø> (+0.01%)	⬆️

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[github-actions]

Reminder, please take a look at this pr: @damccorm

[damccorm]

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[damccorm]

Thanks!