Refactors Reconciler() Method for Kubernetes Provider

[danehans]

Refactors Kubernetes controller:

• Improves readability.
• Improves log messages.
• Updates the reconciler to continue processing a request even if dependent resources cannot be found.

Fixes #788

Signed-off-by: danehans daneyonhansen@gmail.com

[danehans]

cc: @chauhanshubham

[codecov-commenter]

Codecov Report

❌ Patch coverage is 20.00000% with 68 lines in your changes missing coverage. Please review.
✅ Project coverage is 61.77%. Comparing base (b43a492) to head (84e720d).
⚠️ Report is 4046 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/provider/kubernetes/controller.go	20.23%	65 Missing and 2 partials ⚠️
internal/provider/kubernetes/routes.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #803      +/-   ##
==========================================
- Coverage   62.00%   61.77%   -0.23%     
==========================================
  Files          46       46              
  Lines        5995     6023      +28     
==========================================
+ Hits         3717     3721       +4     
- Misses       2045     2068      +23     
- Partials      233      234       +1     

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[danehans]

This PR is required to enable the HTTPRouteReferenceGrant conformance test.

[danehans]

Superseded by #793