Addon-a11y: Fix to use loadStory over deprecated fromId

[tmeasday]

Issue: #16353

What I did

Use async loadStory(), rather than deprecated fromId()

How to test

• Is this testable with Jest or Chromatic screenshots?

We could add an e2e test?

• Does this need a new example in the kitchen sink apps?

I restored addon-a11y to a couple of examples

[nx-cloud]

Nx Cloud Report

CI ran the following commands for commit 8edf6a6. Click to see the status, the terminal output, and the build insights.

📂 See all runs for this branch

Status	Command
	nx run-many --target=prepare --all --parallel --max-parallel=15

---

Sent with 💌 from NxCloud.

[tmeasday]

I accidentally pushed a commit from this branch to next, thus the revert madness

[shilman]

LGTM. @tmeasday what implications does this have for our broader addon ecosystem, if any? do we need to write a migration guide for addon authors?

[tmeasday]

LGTM. @tmeasday what implications does this have for our broader addon ecosystem, if any? do we need to write a migration guide for addon authors?

I'm not sure how common it is for addon authors to be using internal store APIs like fromId() or raw()/extract(). I can add some migration notes about it I guess?

[shilman]

Nice one 💯