Refactor metrics register exporter setup #3924
Description
What happened:
Inside cmd/controller/main.go, cmd/extensions/main.go and cmd/allocator/main.go there's an opportunity to refactor the setup metric registry exporter logic.
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What happened:
Inside cmd/controller/main.go, cmd/extensions/main.go and cmd/allocator/main.go there's an opportunity to refactor the setup metric registry exporter logic.