Build: Fix CI checks

[gaetanmaisse]

What I did

• Add eslint ignore comment to disable a no-underscore-dangle error in lib/components/src/bar/button.stories.tsx (introduced by UI: Update the toolbar button styles #16429)
• Update Preact preset filename
• Skip source snippet cypress test for @storybook/html

How to test

• CI should be 🟢

[nx-cloud]

Nx Cloud Report

CI ran the following commands for commit 0ca55ae. 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.

[gaetanmaisse]

Still to discuss (@yannbf @shilman I will ping you on Discord):

• Background change isn't working every time with Vue (but after multiple selections it finally works) -> Locally I have the following warning in console: Setting a global value that is undeclared (i.e. not in the user's initial set of globals or globalTypes) is deprecated and will have no effect in 7.0. so maybe we have to update the CLI templates?
• addon-docs cypress tests for Preact -> are the feature implemented but not working or should we disable the tests?

[yannbf]

Still to discuss (@yannbf @shilman I will ping you on Discord):

• Background change isn't working every time with Vue (but after multiple selections it finally works) -> Locally I have the following warning in console: Setting a global value that is undeclared (i.e. not in the user's initial set of globals or globalTypes) is deprecated and will have no effect in 7.0. so maybe we have to update the CLI templates?
• addon-docs cypress tests for Preact -> are the feature implemented but not working or should we disable the tests?

I'll check this as soon as I can! My feeling is that @tmeasday knows what could be causing this. I think that message has been introduced recently

[tmeasday]

Wow, it was a while ago I added that warning and I can't quite remember, but I am sure it would have been something we discussed @shilman? Perhaps you recall.

In any case, I guess the warning is sort of self explanatory. Is this an issue with the backgrounds addon?

[shilman]

I'll look into the HTML snippet issue

[gaetanmaisse]

HTML code snippet is ok now ✅

There is still an issue with addon background + vue, see CircleCI artefact: https://351763-54173593-gh.circle-artifacts.com/3/cypress/sfcVue/addon-backgrounds.spec.ts.mp4

@shilman I can try to investigate a bit more on ⬆️ during the next few days but I think it worth it to merge this PR as it fixes a lot of other CI issues