Accessible name: consider implementation of step 2A for host language elements

[Jym77]

Step 2A reads:

If the current node is hidden and is:

• Not part of an aria-labelledby or aria-describedby traversal, where the node directly referenced by that relation was hidden.
• Nor part of a native host language text alternative element (e.g. label in HTML) or attribute traversal, where the root of that traversal was hidden.
  Return the empty string.

The first bullet is implemented in Alfa. The second bullet is not.
It seems to not be implemented in UAs either, and is discussed in w3c/accname#148 and w3c/html-aam#370
We'll wait until the discussions resolve and implementations happen before following suit.