[Addon] add redis-operator addon

[charlie0129]

Description of your changes

Fixes kubevela/kubevela#4288

• installation of the crd and operator https://github.com/spotahome/redis-operator
• Useful and reliable ComponentDefinition
  • Health check of redis cluster (I can't find a good way to do health checks, see code comments)
  • Expose an endpoint for using (available as a Service)
  • Support scale up/down
• Documentation
  • use redis cli to connect with demo

How has this code been tested?

Checklist

I have:

• Title of the PR starts with type (e.g. [Addon] , [example] or [Doc]).
• Updated/Added any relevant documentation and examples.
• New addon should be put in experimental.
• Update addon should modify the version in metadata.yaml to generate a new version.

[wonderflow]

good job