feat: use client.Client instead of K8sClient in finalizer.

[drivebyer]

• Eliminated the K8sClient field from the Reconciler struct in Redis-related controller files, including redis_controller.go, redis_controller_suite_test.go, and redisreplication_controller.go, as it was not utilized.
• Updated finalizer handling functions to remove K8sClient parameters, simplifying the function signatures and improving code clarity.
• Adjusted related test cases to reflect these changes, ensuring consistency across the codebase.

This refactor enhances maintainability by streamlining the code and removing unnecessary dependencies.

Description

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

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 6.38298% with 44 lines in your changes missing coverage. Please review.

Project coverage is 29.30%. Comparing base (60ef5a2) to head (a856765).
Report is 13 commits behind head on master.

Files with missing lines	Patch %	Lines
pkg/k8sutils/finalizer.go	0.00%	42 Missing ⚠️
main.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1183      +/-   ##
==========================================
- Coverage   30.20%   29.30%   -0.90%     
==========================================
  Files          55       56       +1     
  Lines        6294     6469     +175     
==========================================
- Hits         1901     1896       -5     
- Misses       4200     4399     +199     
+ Partials      193      174      -19     

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