Remove usage of global variable in operatorrules #14
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Before this PR operator rules were stored in a global variable. This prevented a project from having multiple instances with different alerts and recording rules. This PR follows a structured approach where library users create a new instance of the registry where they can register the alerts and recording rules and old functions are now instance methods.
To keep backward compatibility
pkg/operatorrules/compatibility.go
was created that delegates previous functions to the instance methods of a global variable. This is deprecated and should be removed in the future.