Move testhelper package to pkg so it can be installed as dependency in secrets injector repo

pkg/testhelper/kind/kind.go

@@ -0,0 +1,23 @@
+package kind
+
+import (
+	"os"
+
+	//nolint:staticcheck // ST1001
+	. "github.com/onsi/ginkgo/v2"
+	//nolint:staticcheck // ST1001
+	. "github.com/onsi/gomega"
+
+	"github.com/1Password/onepassword-operator/pkg/testhelper/system"
+)
+
+// LoadImageToKind loads a local docker image to the Kind cluster
+func LoadImageToKind(imageName string) {
+	By("loading the operator image on Kind")
+	clusterName := "kind"
+	if value, ok := os.LookupEnv("KIND_CLUSTER"); ok {
+		clusterName = value
+	}
+	_, err := system.Run("kind", "load", "docker-image", imageName, "--name", clusterName)
+	Expect(err).NotTo(HaveOccurred())
+}