Revert label commit and update golang to v1.21.5 (#60)

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bug
**Which issue does this PR fix**:
#59 

**What does this PR do / Why do we need it**:
We revert a label improvement which can cause PE creation failure when
using long name for its network policy.

**If an issue # is not available please add steps to reproduce and the
controller logs**:


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been tested?**:


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By submitting this pull request, I confirm that my contribution is made
under the terms of the Apache 2.0 license.

Author: haouc

.github/workflows/pr-tests.yaml

@@ -71,7 +71,7 @@ jobs:
         uses: actions/checkout@v3
       - uses: actions/setup-go@v4
         with:
-          go-version: '1.21.4'
+          go-version: '1.21.5'
           cache-dependency-path: "**/go.sum"
       - name: Install `govulncheck`
         run: go install golang.org/x/vuln/cmd/govulncheck@latest

Makefile

@@ -173,7 +173,7 @@ $(MOCKGEN): $(LOCALBIN)
 	test -s $(MOCKGEN) || GOBIN=$(LOCALBIN) go install github.com/golang/mock/mockgen@v1.6.0
 
 GOARCH=amd64
-BUILD_IMAGE=public.ecr.aws/docker/library/golang:1.21.4
+BUILD_IMAGE=public.ecr.aws/docker/library/golang:1.21.5
 BASE_IMAGE=public.ecr.aws/eks-distro-build-tooling/eks-distro-minimal-base-nonroot:latest.2
 GO_RUNNER_IMAGE=public.ecr.aws/eks-distro/kubernetes/go-runner:v0.15.0-eks-1-27-3
 .PHONY: docker-buildx

pkg/policyendpoints/manager.go

@@ -23,10 +23,6 @@ import (
 	"github.com/aws/amazon-network-policy-controller-k8s/pkg/resolvers"
 )
 
-const (
-	LabelKeyToParentPolicyName = "networking.k8s.io/parent-network-policy-name"
-)
-
 type PolicyEndpointsManager interface {
 	Reconcile(ctx context.Context, policy *networking.NetworkPolicy) error
 	Cleanup(ctx context.Context, policy *networking.NetworkPolicy) error
@@ -193,9 +189,6 @@ func (m *policyEndpointsManager) newPolicyEndpoint(policy *networking.NetworkPol
 					Controller:         &isController,
 				},
 			},
-			Labels: map[string]string{
-				LabelKeyToParentPolicyName: policy.Name,
-			},
 		},
 		Spec: policyinfo.PolicyEndpointSpec{
 			PodSelector:          &policy.Spec.PodSelector,