Investigate how we name image button with an empty alt

[Jym77]

See the clarification at w3c/html-aam#414 (comment)

[Jym77]

  <input type="image" aria-label="aria-label only" />
  <!-- name: aria-label only -->

  <input
    type="image"
    aria-label="label alt and title, use label"
    alt="label alt and title, use alt"
    title="label alt and title, use title"
  />
  <!-- name: label alt and title, use label -->

  <input type="image" alt="alt only" />
  <!-- name: alt only -->

  <input type="image" aria-label="" alt="empty label, alt" />
  <!-- name: empty label, alt -->

  <input type="image" title="title only" />
  <!-- name: title only -->

  <input type="image" aria-label="" title="empty label, title" />
  <!-- name: empty label, title -->

  <input type="image" alt="" title="empty alt, title" />
  <!-- name: empty alt, title -->

  <input
    type="image"
    aria-label=""
    alt=""
    title="empty label, empty alt, title"
  />
  <!-- name: empty label, empty alt, title -->

  <input type="image" aria-label="" alt="" title="" />
  <!-- name: Submit Query -->

So, we seem to be correctly going to next step when encountering an empty string, which is the AAM intention 💯

Closing this.