Refactor the KLM main entry function

[medmes]

Description

The main cmd/main.go function does a lot of responsibilities:

1. Flags parsing and logger configuration
2. Registering Schemes into k8s API Machinery for GVK/Go Schemas mapping.
3. Profiling (pprof server).
4. Manager setup for the reconcilers.
5. Healthchecks
6. Metrics and CleanUp.

Reasons

• Violating the single responsibility principle.
• Main should be simple as possible Setup , Run and Error handling.

Acceptance Criteria

• - Refactor the code into smaller code.
• - Configuration Initialisation (flags initialisation).
• - Make sure the main has a minimal setUp ,
• - Take in consideration the Error handling.
• - The main function should follow SRP principle.
• - Logging and Monitoring function call
• - Graceful shutdown.