refactor: replace glog in metrics & telemetry packages

[pdabelf5]

Proposed changes

Replace glog with slog in metrics & telemetry packages for:

• metrics/collectors/latency.go
• metrics/collectors/processes.go
• metrics/listener.go
• metrics/syslog_listener.go
• telemetry/collector.go

NOTE:

GLog Levels	Slog Levels
glog.V(3).Infof()	log.Debugf()
glog.V(3).Info()	log.Debug()
glog.V(2).Infof()	log.Debugf()
glog.V(2).Info()	log.Debugf()
glog.Infof()	log.Infof()
glog.Info()	log.Info()
glog.Warningf()	log.Warnf()
glog.Warning()	log.Warn()
glog.Errorf()	log.Errorf()
glog.Error()	log.Error()
glog.Fatalf()	log.Fatalf()
glog.Fatal()	log.Fatal()

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

[AlexFenlon]

nil pointer for tests in collector_test.go - specifically anything that uses CollectorConfig

so please add "Context: context.Background(), " to each CollectorConfig to fix this issue.