kube,cmd/{k8s-operator,containerboot},envknob,ipn/store/kubestore,*/depaware.txt: rename packages (#13418)

Rename kube/{types,client,api} -> kube/{kubetypes,kubeclient,kubeapi}
so that we don't need to rename the package on each import to
convey that it's kubernetes specific.

Updates#cleanup

Signed-off-by: Irbe Krumina <irbe@tailscale.com>

kube/kubeclient/fake_client.go

@@ -0,0 +1,36 @@
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
+
+package kubeclient
+
+import (
+	"context"
+	"net"
+
+	"tailscale.com/kube/kubeapi"
+)
+
+var _ Client = &FakeClient{}
+
+type FakeClient struct {
+	GetSecretImpl              func(context.Context, string) (*kubeapi.Secret, error)
+	CheckSecretPermissionsImpl func(ctx context.Context, name string) (bool, bool, error)
+}
+
+func (fc *FakeClient) CheckSecretPermissions(ctx context.Context, name string) (bool, bool, error) {
+	return fc.CheckSecretPermissionsImpl(ctx, name)
+}
+func (fc *FakeClient) GetSecret(ctx context.Context, name string) (*kubeapi.Secret, error) {
+	return fc.GetSecretImpl(ctx, name)
+}
+func (fc *FakeClient) SetURL(_ string) {}
+func (fc *FakeClient) SetDialer(dialer func(ctx context.Context, network, addr string) (net.Conn, error)) {
+}
+func (fc *FakeClient) StrategicMergePatchSecret(context.Context, string, *kubeapi.Secret, string) error {
+	return nil
+}
+func (fc *FakeClient) JSONPatchSecret(context.Context, string, []JSONPatch) error {
+	return nil
+}
+func (fc *FakeClient) UpdateSecret(context.Context, *kubeapi.Secret) error { return nil }
+func (fc *FakeClient) CreateSecret(context.Context, *kubeapi.Secret) error { return nil }