feat: implement redis cluster ready state

[drivebyer]

Description

When we got ready state, the redis cluster should be healthy.

Type of change

• New feature (non-breaking change which adds functionality)

Checklist

• Tests have been added/modified and all tests pass.
• Functionality/bugs have been confirmed to be unchanged or fixed.
• I have performed a self-review of my own code.
• Documentation has been updated or added where necessary.

Additional Context

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 33 lines in your changes are missing coverage. Please review.

Project coverage is 38.34%. Comparing base (d121d86) to head (024835f).
Report is 22 commits behind head on master.

Files	Patch %	Lines
k8sutils/redis.go	0.00%	28 Missing ⚠️
controllers/rediscluster_controller.go	0.00%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #867      +/-   ##
==========================================
+ Coverage   35.20%   38.34%   +3.14%     
==========================================
  Files          19       19              
  Lines        3213     2655     -558     
==========================================
- Hits         1131     1018     -113     
+ Misses       2015     1569     -446     
- Partials       67       68       +1     

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[shubham-cmyk]

LGTM