[feat] Replace perflog_compat with perflog_multiline in logging configuration

[vkarak]

The older perflog_compat is now deprecated.

Closes #3407.

[codecov]

Codecov Report

❌ Patch coverage is 66.66667% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 91.26%. Comparing base (1102ce8) to head (3b437b1).
⚠️ Report is 2 commits behind head on develop.

Files with missing lines	Patch %	Lines
reframe/frontend/cli.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #3578   +/-   ##
========================================
  Coverage    91.25%   91.26%           
========================================
  Files           62       62           
  Lines        13534    13536    +2     
========================================
+ Hits         12350    12353    +3     
+ Misses        1184     1183    -1     

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