do not use global timeNow variables

[aldas]

fixes #2476 . This is problematic in tests as this is only place where that global now variable could be mutated

[codecov]

Codecov Report

Patch coverage: 88.88% and project coverage change: -0.07 ⚠️

Comparison is base (42f07ed) 92.87% compared to head (ec2e034) 92.81%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2477      +/-   ##
==========================================
- Coverage   92.87%   92.81%   -0.07%     
==========================================
  Files          39       39              
  Lines        4616     4618       +2     
==========================================
- Hits         4287     4286       -1     
- Misses        239      241       +2     
- Partials       90       91       +1     

Impacted Files	Coverage Δ
middleware/rate_limiter.go	96.90% <87.50%> (-3.10%)	⬇️
middleware/request_logger.go	97.56% <100.00%> (ø)

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[aldas]

note to self: "Run checks" fails because actions/setup-go has not been updated to know Go 1.20.6 existence