Pointer: Add generic Pointer func

This adds a new, generic pointer func to the pointer package.

Author: alvaroaleman

go.mod

@@ -1,6 +1,6 @@
 module k8s.io/utils
 
-go 1.12
+go 1.18
 
 require (
 	github.com/davecgh/go-spew v1.1.1

pointer/generic.go

@@ -0,0 +1,5 @@
+package pointer
+
+func Pointer[T any](in T) *T {
+	return &in
+}

pointer/generic_test.go

@@ -0,0 +1,10 @@
+package pointer
+
+import "testing"
+
+func TestPointer(t *testing.T) {
+	ptr := Pointer(5)
+	if *ptr != 5 {
+		t.Errorf("expected pointer value to be 5, was %v", *ptr)
+	}
+}