Poor reporter output for concrete type versus interface type difference

[Consider this example](https://go.dev/play/p/yXIwnbQggep):
```go
func addr[T any](v T) *T {
	return &v
}
fmt.Println(cmp.Diff(
	addr("hello"),
	addr(any("hello")),
))
```

This currently prints:
```
  any(
- 	&⟪0xc0000102f0⟫string("hello"),
+ 	&⟪0xc000010300⟫string("hello"),
  )
```
which is unhelpful for determining exactly what the difference is.