chore: Possible fix for size/RSS issue

Using scheme package increases the binary size because it includes
additional code and dependencies related to Kubernetes. It also
increases the RSS memory.

Because we don't need the entire scheme package, only
apimachinery/runtime package was used to create a new scheme.

commit: 3b5175d (main), cherry-pick

go.mod

@@ -39,7 +39,6 @@ require (
 	k8s.io/apimachinery v0.28.3
 	k8s.io/client-go v0.28.3
 	k8s.io/cri-api v0.29.0
-	k8s.io/kubectl v0.27.7
 	kernel.org/pub/linux/libs/security/libcap/cap v1.2.68
 	sigs.k8s.io/controller-runtime v0.16.3
 )

go.sum

@@ -578,8 +578,6 @@ k8s.io/klog/v2 v2.100.1 h1:7WCHKK6K8fNhTqfBhISHQ97KrnJNFZMcQvKp7gP/tmg=
 k8s.io/klog/v2 v2.100.1/go.mod h1:y1WjHnz7Dj687irZUWR/WLkLc5N1YHtjLdmgWjndZn0=
 k8s.io/kube-openapi v0.0.0-20230717233707-2695361300d9 h1:LyMgNKD2P8Wn1iAwQU5OhxCKlKJy0sHc+PcDwFB24dQ=
 k8s.io/kube-openapi v0.0.0-20230717233707-2695361300d9/go.mod h1:wZK2AVp1uHCp4VamDVgBP2COHZjqD1T68Rf0CM3YjSM=
-k8s.io/kubectl v0.27.7 h1:HTEDa4s/oWjB3t5ysdW1yKlcNl9bzigcqWBq0LIIe3k=
-k8s.io/kubectl v0.27.7/go.mod h1:Xb1Ubc8uN1i2RvSN1HCgSHTtzgX0woihMk/gW7XbjJU=
 k8s.io/utils v0.0.0-20230406110748-d93618cff8a2 h1:qY1Ad8PODbnymg2pRbkyMT/ylpTrCM8P2RJ0yroCyIk=
 k8s.io/utils v0.0.0-20230406110748-d93618cff8a2/go.mod h1:OLgZIPagt7ERELqWJFomSt595RzquPNLL48iOWgYOg0=
 kernel.org/pub/linux/libs/security/libcap/cap v1.2.68 h1:137hV1K92dqIjdd46hSJbiKodzfo3pju8uiG6zj1qHY=

pkg/k8s/policy.go

@@ -3,9 +3,9 @@ package k8s
 import (
 	"context"
 
+	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/runtime/serializer"
 	"k8s.io/client-go/rest"
-	"k8s.io/kubectl/pkg/scheme"
 
 	"github.com/aquasecurity/tracee/pkg/k8s/apis/tracee.aquasec.com/v1beta1"
 )
@@ -20,15 +20,16 @@ func New() (*Client, error) {
 		return nil, err
 	}
 
-	err = v1beta1.AddToScheme(scheme.Scheme)
+	scheme := runtime.NewScheme()
+	err = v1beta1.AddToScheme(scheme)
 	if err != nil {
 		return nil, err
 	}
 
 	crdConfig := *config
 	crdConfig.ContentConfig.GroupVersion = &v1beta1.GroupVersion
 	crdConfig.APIPath = "/apis"
-	crdConfig.NegotiatedSerializer = serializer.NewCodecFactory(scheme.Scheme)
+	crdConfig.NegotiatedSerializer = serializer.NewCodecFactory(scheme)
 	crdConfig.UserAgent = rest.DefaultKubernetesUserAgent()
 
 	client, err := rest.UnversionedRESTClientFor(&crdConfig)