Consider exception to `no-attribute-value` if type is checkbox/radio

Checkboxes and radios are unique in that they have a default value of `"on"`. If you use property binding, you cannot take advantage of this:

```js
html`` // will submit as string "undefined"
html`` // will submit as empty string ""
html`` // will submit as empty string ""
```

Whereas if you use the attribute binding, you can conditionally render the attribute and fallback to the default:

```js
html`` // will submit as "on"
```

In my testing this works correctly even if a value is initially set, and later changed, or if attribute is later removed.

Happy to attempt a PR if you don't object