don't propagate kebab-case annotations to internal networking types

[dprotaso]

note: a prior knative.dev/networking dependency bump added support for this already [here](-
https://github.com/knative/serving/pull/12315/files#diff-3cbf862804033eee2a74359afd3314ab56212340da183a31a3d62f3cc2a186d0R113-R143)

This PR just ensures kebab case annotations aren't propagated to the KIngress & KCert since not all implementation recognize them

• don't set alternate annotations on internal networking types

Part of #12103

[dprotaso]

/assign @nak3

[codecov]

Codecov Report

Merging #12313 (e1a438a) into main (a816f59) will increase coverage by 0.04%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main   #12313      +/-   ##
==========================================
+ Coverage   87.52%   87.57%   +0.04%     
==========================================
  Files         195      195              
  Lines        9594     9631      +37     
==========================================
+ Hits         8397     8434      +37     
  Misses        917      917              
  Partials      280      280              

Impacted Files	Coverage Δ
pkg/reconciler/route/resources/filters.go	100.00% <ø> (ø)
pkg/reconciler/domainmapping/resources/ingress.go	100.00% <100.00%> (ø)
pkg/reconciler/route/resources/certificate.go	100.00% <100.00%> (ø)
pkg/reconciler/route/resources/ingress.go	93.14% <100.00%> (+0.07%)	⬆️
pkg/reconciler/configuration/configuration.go	84.61% <0.00%> (-1.54%)	⬇️
pkg/reconciler/revision/background.go	91.81% <0.00%> (+1.81%)	⬆️

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[psschwei]

/lgtm

[knative-prow-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dprotaso, psschwei

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