chore(kuma-cp): use appProtocol by default

[jakubdyszkiewicz]

Summary

See kumahq/kuma-website#731

Issues resolved

No issues reported

Documentation

kumahq/kuma-website#731

Testing

• Unit tests
• E2E tests
• Manual testing on Universal
• Manual testing on Kubernetes

Backwards compatibility

- [ ] Update UPGRADE.md with any steps users will need to take when upgrading.
- [ ] Add backport-to-stable label if the code follows our backporting policy

Changelog: chore(k8s): use appProtocol from service by default

[codecov-commenter]

Codecov Report

Merging #4015 (45b98c1) into master (6461cb9) will decrease coverage by 0.01%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master    #4015      +/-   ##
==========================================
- Coverage   56.06%   56.04%   -0.02%     
==========================================
  Files         919      919              
  Lines       55097    55098       +1     
==========================================
- Hits        30888    30882       -6     
- Misses      21766    21770       +4     
- Partials     2443     2446       +3     

Impacted Files	Coverage Δ
...est/framework/deployments/testserver/kubernetes.go	0.00% <0.00%> (ø)
pkg/core/tokens/default_signing_key.go	66.66% <0.00%> (-13.89%)	⬇️
pkg/plugins/runtime/gateway/route/sorter.go	66.66% <0.00%> (-5.13%)	⬇️
pkg/core/secrets/manager/global_manager.go	39.39% <0.00%> (-3.04%)	⬇️
pkg/core/resources/model/rest/resource.go	71.60% <0.00%> (-1.24%)	⬇️
pkg/plugins/resources/postgres/store.go	74.68% <0.00%> (-0.43%)	⬇️
pkg/xds/generator/direct_access_proxy_generator.go	90.80% <0.00%> (+1.14%)	⬆️
pkg/defaults/components.go	88.88% <0.00%> (+3.70%)	⬆️
pkg/kds/reconcile/reconciler.go	84.61% <0.00%> (+5.12%)	⬆️

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