deps: upgrade storybook/jest and storybook/testing-library in examples

[yannbf]

Issue: N/A

What I did

• Updated @storybook/testing-library and @storybook/jest to the latest
• Used new matchers feature in story examples, like .toBeInTheDocument()

How to test

• Is this testable with Jest or Chromatic screenshots?
• Does this need a new example in the kitchen sink apps?
• Does this need an update to the documentation?

If your answer is yes to any of these, please make sure to include it in your PR.

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[yannbf]

@shilman I've got no idea why the angular snapshots are changed. It's an angular attribute e.g _nghost-a-c44 (that should have never been included because we use jest-preset-angular/build/serializers/no-ng-attributes). I took the opportunity to migrate the setup because it was deprecated, although the snapshots still changed. @storybookjs/angular any help? Thanks!

[shilman]

@yannbf I've updated the PR and fixed the lockfile, but the change seems to be causing some other errors in the build. Can you please look into it?

[yannbf]

Closing this in favor of #18582