[improve][sec] Revert "Add group pulsar and add user pulsar to it instead of root"

[yaalsn]

Motivation

Reverts #21084. Because the change breaks OpenShift support.

Modifications

Verifying this change

• Make sure that the change passes the CI checks.

Documentation

• doc
• doc-required
• doc-not-needed
• doc-complete

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73.39%. Comparing base (f25b082) to head (2c117bb).
⚠️ Report is 1939 commits behind head on master.

Additional details and impacted files

@@              Coverage Diff              @@
##             master   #21691       +/-   ##
=============================================
+ Coverage     34.49%   73.39%   +38.90%     
- Complexity    12116    32751    +20635     
=============================================
  Files          1716     1893      +177     
  Lines        131152   140754     +9602     
  Branches      14327    15503     +1176     
=============================================
+ Hits          45236   103307    +58071     
+ Misses        79828    29343    -50485     
- Partials       6088     8104     +2016     

Flag	Coverage Δ
inttests	24.11% <ø> (?)
systests	24.70% <ø> (-0.03%)	⬇️
unittests	72.69% <ø> (+40.91%)	⬆️

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see 1479 files with indirect coverage changes

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