Allow enabling managed modules via kyma CLI

[kwiatekus]

Description

User of managed kyma runtime should be able to:

• enable managed module (with custom module CR)
• enable managed module (with default module CR)
• disable managed module

Reason
Possibility to toggle modules on/off via cli would simplify implementing automation scenarios for kyma users

Related
Part of #2251

Ideas
kyma alpha module enable serverless - enables serverlss operator, but serverless CR is not created
kyma alpha module enable serverless --defult-config - enables serverlss operator, with default serverless CR
kyma alpha module enable serverless --config {path to serverlss CR} - enables serverlss operator, with custom serverless CR
kyma alpha module disable serverless - removes serverless CR (manually if CustomResourcePolicy is set to false) and operator

[kwiatekus]

Should we rename enable/disable commands to add/delete ?
I.e
kyma alpha module add template-operator --default-cr
rather than
kyma alpha module enable template-operator --default-cr

[pbochynski]

It was discussed when module management was introduced in Kyma Dashboard. Our UX experts recommended us to use add/delete for module management. The same commands should be used in the CLI, so add/delete is the right choice.