[RELEASE-1.13] Drop uid and guid in 3scale-kourier-gateway

[ReToCode]

Changes

• Drop uid and guid in 3scale-kourier-gateway
• As per Bump Serving manifests to 1.12 serverless-operator#2524 (comment)

/assign @skonto

I'll do a manual port to main if openshift-knative/serverless-operator#2524 works.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

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Additional details and impacted files

@@               Coverage Diff                @@
##             release-v1.13     #127   +/-   ##
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  Coverage                 ?   60.63%           
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  Files                    ?       24           
  Lines                    ?     2002           
  Branches                 ?        0           
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  Hits                     ?     1214           
  Misses                   ?      726           
  Partials                 ?       62           

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[skonto]

/lgtm

[openshift-ci]

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