Release: Prerelease 9.0.0-alpha.12

[github-actions]

This is an automated pull request that bumps the version from 9.0.0-alpha.11 to 9.0.0-alpha.12.
Once this pull request is merged, it will trigger a new release of version 9.0.0-alpha.12.
If you're not a core maintainer with permissions to release you can ignore this pull request.

To do

Before merging the PR, there are a few QA steps to go through:

• Add the "freeze" label to this PR, to ensure it doesn't get automatically forced pushed by new changes.
• Add the "ci:daily" label to this PR, to trigger the full test suite to run on this PR.

And for each change below:

1. Ensure the change is appropriate for the version bump. E.g. patch release should only contain patches, not new or de-stabilizing features. If a change is not appropriate, revert the PR.
2. Ensure the PR is labeled correctly with one of: "BREAKING CHANGE", "feature request", "bug", "maintenance", "dependencies", "documentation", "build", "unknown".
3. Ensure the PR title is correct, and follows the format "[Area]: [Summary]", e.g. "React: Fix hooks in CSF3 render functions". If it is not correct, change the title in the PR.
   • Areas include: React, Vue, Core, Docs, Controls, etc.
   • First word of summary indicates the type: “Add”, “Fix”, “Upgrade”, etc.
   • The entire title should fit on a line

This is a list of all the PRs merged and commits pushed directly to next, that will be part of this release:

• 🔧 Maintenance: Maintenance: Remove obsolete automigrations #30945
• ❗ Breaking Change: Vue3: Remove support for Webpack 5 #30958
• ❗ Breaking Change: Preact: Remove support for Preact Webpack 5 #30957
• 🐛 Bug: Core: Fix telemetry error on Storybok UI #30953 (will also be patched)
• ❗ Breaking Change: Next.js-Vite: Stabilize @storybook/experimental-nextjs-vite #30956
• ❗ Breaking Change: Maintenance: Drop tooling support #30940
• 🐛 Bug: Manager: Fix Uncaught ReferenceError: global is not defined #30970
• 🐛 Bug: Core: Fix flaky unit tests related to stores #30963
• ❗ Breaking Change: Maintenance: Remove deprecated APIs #30926
• ✨ Feature Request: UI: Visual tweaks to badges and improved layout for a11y panel #30955
• ❗ Breaking Change: Addon-Test: Migrate to new test provider API, drop Vitest 2 support #30875
• 🐛 Bug: Angular: Fix zone.js support for Angular libraries #30941 (will also be patched)
• ✨ Feature Request: Addon-A11y: Various improvements #30774
• 🏗️ Build: Build: Fix docs usage in Storybook UI #30939

If you've made any changes doing the above QA (change PR titles, revert PRs), manually trigger a re-generation of this PR with this workflow and wait for it to finish. It will wipe your progress in this to do, which is expected.

Feel free to manually commit any changes necessary to this branch after you've done the last re-generation, following the Make Manual Changes section in the docs, especially if you're making changes to the changelog.

When everything above is done:

• Merge this PR
• Follow the run of the publish action

---

Generated changelog

9.0.0-alpha.12

• Addon-A11y: Various improvements - #30774, thanks @ghengeveld!
• Addon-Test: Migrate to new test provider API, drop Vitest 2 support - #30875, thanks @JReinhold!
• Angular: Fix zone.js support for Angular libraries - #30941, thanks @valentinpalkovic!
• Core: Fix flaky unit tests related to stores - #30963, thanks @JReinhold!
• Core: Fix telemetry error on Storybok UI - #30953, thanks @yannbf!
• Maintenance: Drop tooling support - #30940, thanks @valentinpalkovic!
• Maintenance: Remove deprecated APIs - #30926, thanks @valentinpalkovic!
• Maintenance: Remove obsolete automigrations - #30945, thanks @valentinpalkovic!
• Manager: Fix Uncaught ReferenceError: global is not defined - #30970, thanks @JReinhold!
• Next.js-Vite: Stabilize @storybook/experimental-nextjs-vite - #30956, thanks @valentinpalkovic!
• Preact: Remove support for Preact Webpack 5 - #30957, thanks @valentinpalkovic!
• UI: Visual tweaks to badges and improved layout for a11y panel - #30955, thanks @ghengeveld!
• Vue3: Remove support for Webpack 5 - #30958, thanks @valentinpalkovic!