fix: sentinel should not reconcile until replication cluster ready

[drivebyer]

Description

Fixes #522

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist

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

Additional Context

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 11.11111% with 16 lines in your changes missing coverage. Please review.

Project coverage is 40.98%. Comparing base (d121d86) to head (412e698). Report is 63 commits behind head on master.

Files	Patch %	Lines
k8sutils/redis-sentinel.go	0.00%	12 Missing :warning:
k8sutils/redis-replication.go	0.00%	4 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #964 +/- ## ========================================== + Coverage 35.20% 40.98% +5.78% ========================================== Files 19 20 +1 Lines 3213 2674 -539 ========================================== - Hits 1131 1096 -35 + Misses 2015 1505 -510 - Partials 67 73 +6 ```

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