Copy PodTemplate defaulter from Kubernetes to avoid dependency (#143)

Fixes #142.

We need the functionality provided by this code, but it is sadly
k8s internal and not registered by the AddToScheme method of the
approved API package.

Author: dgrove-oss

go.mod

@@ -3,13 +3,13 @@ module github.com/project-codeflare/appwrapper
 go 1.21
 
 require (
+	github.com/distribution/reference v0.5.0
 	github.com/onsi/ginkgo/v2 v2.16.0
 	github.com/onsi/gomega v1.31.1
 	github.com/open-policy-agent/cert-controller v0.10.1
 	k8s.io/api v0.29.2
 	k8s.io/apimachinery v0.29.2
 	k8s.io/client-go v0.29.2
-	k8s.io/kubernetes v1.29.2
 	k8s.io/utils v0.0.0-20230726121419-3b25d923346b
 	sigs.k8s.io/controller-runtime v0.17.0
 	sigs.k8s.io/kueue v0.6.2
@@ -21,7 +21,6 @@ require (
 	github.com/blang/semver/v4 v4.0.0 // indirect
 	github.com/cespare/xxhash/v2 v2.2.0 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/distribution/reference v0.5.0 // indirect
 	github.com/emicklei/go-restful/v3 v3.11.0 // indirect
 	github.com/evanphx/json-patch/v5 v5.8.0 // indirect
 	github.com/fsnotify/fsnotify v1.7.0 // indirect

go.sum

@@ -229,8 +229,6 @@ k8s.io/kube-aggregator v0.28.1 h1:rvG4llYnQKHjj6YjjoBPEJxfD1uH0DJwkrJTNKGAaCs=
 k8s.io/kube-aggregator v0.28.1/go.mod h1:JaLizMe+AECSpO2OmrWVsvnG0V3dX1RpW+Wq/QHbu18=
 k8s.io/kube-openapi v0.0.0-20231010175941-2dd684a91f00 h1:aVUu9fTY98ivBPKR9Y5w/AuzbMm96cd3YHRTU83I780=
 k8s.io/kube-openapi v0.0.0-20231010175941-2dd684a91f00/go.mod h1:AsvuZPBlUDVuCdzJ87iajxtXuR9oktsTctW/R9wwouA=
-k8s.io/kubernetes v1.29.2 h1:8hh1cntqdulanjQt7wSSSsJfBgOyx6fUdFWslvGL5m0=
-k8s.io/kubernetes v1.29.2/go.mod h1:xZPKU0yO0CBbLTnbd+XGyRmmtmaVuJykDb8gNCkeeUE=
 k8s.io/utils v0.0.0-20230726121419-3b25d923346b h1:sgn3ZU783SCgtaSJjpcVVlRqd6GSnlTLKgpAAttJvpI=
 k8s.io/utils v0.0.0-20230726121419-3b25d923346b/go.mod h1:OLgZIPagt7ERELqWJFomSt595RzquPNLL48iOWgYOg0=
 sigs.k8s.io/controller-runtime v0.17.0 h1:fjJQf8Ukya+VjogLO6/bNX9HE6Y2xpsO5+fyS26ur/s=