[EPIC] Restructure/refactor submariner-operator repo

[Jaanki]

• Move packaging of operator to another repo - "deploy"?
• Make subctl a library - Depends on subctl should be refactored to a library, and make subctl the CLI of that library #1329
• Support to install operator in custom namespace - Deepnds on Support deployment within a custom namespace #1040
• Use go:embed instead of go:generate
• Check for any other optimizations

[github-actions]

⏳ Alright! Looks like we need to wait for some dependencies:

• subctl should be refactored to a library, and make subctl the CLI of that library #1329

💡 Don't worry, I will continue watching the list above and keep this comment updated. To add or remove a dependency please update this issue/PR description.

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[Jaanki]

[Note for self] Support for the legacy package manifest format for Operators is removed in OpenShift Container Platform 4.8 and later.

[Jaanki]

Closed in favor of submariner-io/enhancements#53