chore: remove Apache license header from generated files (backport #5565)

[mergify]

This is an automatic backport of pull request #5565 done by Mergify.
Cherry-pick of fdac0e2 has failed:

On branch mergify/bp/release-2.0/pr-5565
Your branch is up to date with 'origin/release-2.0'.

You are currently cherry-picking commit fdac0e281.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   mk/generate.mk
	deleted:    tools/policy-gen/boilerplate.go.txt

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	both modified:   api/common/v1alpha1/zz_generated.deepcopy.go
	both modified:   pkg/plugins/policies/donothingpolicy/api/v1alpha1/zz_generated.deepcopy.go
	both modified:   pkg/plugins/policies/donothingpolicy/k8s/v1alpha1/zz_generated.deepcopy.go
	both modified:   pkg/plugins/policies/meshaccesslog/api/v1alpha1/zz_generated.deepcopy.go
	both modified:   pkg/plugins/policies/meshaccesslog/k8s/v1alpha1/zz_generated.deepcopy.go
	deleted by us:   pkg/plugins/policies/meshcircuitbreaker/api/v1alpha1/zz_generated.deepcopy.go
	deleted by us:   pkg/plugins/policies/meshcircuitbreaker/k8s/v1alpha1/zz_generated.deepcopy.go
	deleted by us:   pkg/plugins/policies/meshhealthcheck/api/v1alpha1/zz_generated.deepcopy.go
	deleted by us:   pkg/plugins/policies/meshhealthcheck/k8s/v1alpha1/zz_generated.deepcopy.go
	deleted by us:   pkg/plugins/policies/meshratelimit/api/v1alpha1/zz_generated.deepcopy.go
	deleted by us:   pkg/plugins/policies/meshratelimit/k8s/v1alpha1/zz_generated.deepcopy.go
	deleted by us:   pkg/plugins/policies/meshretry/api/v1alpha1/zz_generated.deepcopy.go
	deleted by us:   pkg/plugins/policies/meshretry/k8s/v1alpha1/zz_generated.deepcopy.go
	deleted by us:   pkg/plugins/policies/meshtimeout/api/v1alpha1/zz_generated.deepcopy.go
	deleted by us:   pkg/plugins/policies/meshtimeout/k8s/v1alpha1/zz_generated.deepcopy.go
	both modified:   pkg/plugins/policies/meshtrace/api/v1alpha1/zz_generated.deepcopy.go
	both modified:   pkg/plugins/policies/meshtrace/k8s/v1alpha1/zz_generated.deepcopy.go
	both modified:   pkg/plugins/policies/meshtrafficpermission/api/v1alpha1/zz_generated.deepcopy.go
	both modified:   pkg/plugins/policies/meshtrafficpermission/k8s/v1alpha1/zz_generated.deepcopy.go
	both modified:   pkg/plugins/resources/k8s/native/api/v1alpha1/zz_generated.deepcopy.go

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/github/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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[michaelbeaumont]

This also has the changes to go in it it looks like

[lukidzi]

This also has the changes to go in it it looks like

Without upgrading golang check step fails. CircleCI is attaching the wrong cache with kuma tools and it won't pass