Refactor: Use config embedded in context

[ystkfujii]

Changes

• Removed the extAuthz field in Reconciler, instead utilizing the Config.Kourier.ExternalAuthz embedded within the context.

/kind cleanup

[knative-prow]

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[codecov]

Codecov Report

Attention: Patch coverage is 44.44444% with 5 lines in your changes missing coverage. Please review.

Project coverage is 72.41%. Comparing base (964f1c7) to head (15999f0).

Files with missing lines	Patch %	Lines
pkg/generator/generator.go	0.00%	2 Missing ⚠️
pkg/reconciler/ingress/controller.go	33.33%	2 Missing ⚠️
pkg/reconciler/ingress/ingress.go	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1360      +/-   ##
==========================================
- Coverage   72.46%   72.41%   -0.05%     
==========================================
  Files          25       25              
  Lines        2099     2099              
==========================================
- Hits         1521     1520       -1     
- Misses        486      487       +1     
  Partials       92       92              

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[ystkfujii]

When a configStore is configured, it appears to be embedded within the context.

• Ref: https://github.com/knative/networking/blob/release-1.19/pkg/client/injection/reconciler/networking/v1alpha1/ingress/reconciler.go#L194-L196

Since it's configured, we should now be able to utilize the embedded configuration.

• Ref:

  net-kourier/pkg/reconciler/ingress/controller.go

  Line 114 in 15999f0

  ConfigStore: configStore,

[dsimansk]

/ok-to-test