fix: label selector mapping on redisreplication pdb

[husnialhamdani]

Description
Fixes label selector mapping on redisreplication pdb (that previously added in #1166)

Fixes #ISSUE

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

[husnialhamdani]

@drivebyer please double check from your side,
the PDB was successfully created but the target selector is not matched with the labels of RedisReplication's Pod

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 29.27%. Comparing base (60ef5a2) to head (5062bbb).
Report is 16 commits behind head on master.

Files with missing lines	Patch %	Lines
pkg/k8sutils/poddisruption.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1191      +/-   ##
==========================================
- Coverage   30.20%   29.27%   -0.93%     
==========================================
  Files          55       56       +1     
  Lines        6294     6483     +189     
==========================================
- Hits         1901     1898       -3     
- Misses       4200     4409     +209     
+ Partials      193      176      -17     

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[drivebyer]

lgtm