feat: add support of KongServiceFacade as default Ingress backend

[czeslavo]

What this PR does / why we need it:

Adds support for KongServiceFacade as a default Ingress backend along with tests.

Which issue this PR fixes:

Part of #5152.

PR Readiness Checklist:

Complete these before marking the PR as ready to review:

• the CHANGELOG.md release notes have been updated to reflect any significant (and particularly user-facing) changes introduced by this PR

[codecov]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (64a0a61) 75.5% compared to head (9cb0561) 75.6%.
Report is 1 commits behind head on main.

Files	Patch %	Lines
internal/util/builder/ingress.go	0.0%	3 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #5282   +/-   ##
=====================================
  Coverage   75.5%   75.6%           
=====================================
  Files        170     170           
  Lines      19385   19457   +72     
=====================================
+ Hits       14644   14710   +66     
- Misses      3910    3914    +4     
- Partials     831     833    +2     

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