Change logging library for Go applications

[Richard87]

Change Go logging library in the following applications

• Change Go logging library radix-acr-cleanup#74
• Change Go logging library radix-cluster-cleanup#35
• Change Go logging library radix-cost-allocation-api#107
• Change Go Logging library radix-networkpolicy-canary#21
• Change Go logging library radix-velero-plugin#51
• Change Go logging library radix-vulnerability-scanner#38
• Change Go logging library radix-vulnerability-scanner-api#15
• Change Go logging library radix-cost-allocation#113
• Change Go logging library radix-github-webhook#84
• Change Go logging library radix-log-api#19
• https://github.com/equinor/radix-servicenow-proxy/issues/15
• Change Go logging library radix-tekton#110
• Change Go logging library radix-job-scheduler#113
• Change Go logging library radix-api#596
• Change Go logging library radix-operator#1047

Is your feature request related to a problem? Please describe.
Currently our logging library (logrus) is slow, and limited support for structured logging. This makes it overly hard to troubleshoot bugs.

Describe the solution you'd like
Start using structured logging

Describe alternatives you've considered
I think there are 4 relevant solutions:

• Keep using logrus, but start using the structured output (slow)
• Migrate to slog (new golang standard log library)
• Migrate to zerolog (apparantly twice as fast as slog. Interresting, but very different logging API from slog and logrus)
• Migrate to zerolog, but introduce our own interface matching slog/log (I assume this will be equall to or slower than slog)
• Look into Zap, almost same performance as Zerolog, similar/same API as log/slog

Performance testing from Uber/Zap: https://github.com/uber-go/zap#performance
Log a message and 10 fields:

Package	Time	Time % to zap	Objects Allocated
zerolog	380 ns/op	-42%	1 allocs/op
zap	656 ns/op	+0%	5 allocs/op
zap (sugared)	935 ns/op	+43%	10 allocs/op
go-kit	2249 ns/op	+243%	57 allocs/op
slog (LogAttrs)	2479 ns/op	+278%	40 allocs/op
slog	2481 ns/op	+278%	42 allocs/op
apex/log	9591 ns/op	+1362%	63 allocs/op
log15	11393 ns/op	+1637%	75 allocs/op
logrus	11654 ns/op	+1677%	79 allocs/op

Zerolog:

log.Debug().
    Str("Scale", "833 cents").
    Float64("Interval", 833.09).
    Msg("Fibonacci is everywhere")

slog:

slog.Info("Fibonacci is everywhere", 
    "Scale", "833 cents"
    "Interval", 833,09,
    )

zap:

// Sugar log:
sugar.Infow("Fibonacci is everywhere",
  "Scale",  "833 cents"
  "Interval", 833,09,
  )

// Fastest:
logger.Info("Fibonacci is everywhere",
  zap.String("Scale",  "833 cents"),
  zap.Float6("Interval", 833,09),
  )

logrus

  log.WithFields(log.Fields{
    "Scale":    "833 cents",
    "Interval": 833,09,
  })
  .Info("Fibonacci is everywhere")

[sondresjolyst]

ref: equinor/radix-cicd-canary#175