Revert: Only expose used CSS variables (#16403)

This reverts #16211

We found some unexpected interactions with using `@apply` and CSS
variables in multi-root setups like CSS modules or Vue inline `<style>`
blocks that were broken due to that change. We plan to re-enable this
soon and include a proper fix for those scenarios.

## Test plan

- Updated snapshots
- Tested using the CLI in a new project:
<img width="1523" alt="Screenshot 2025-02-10 at 13 08 42"
src="https://github.com/user-attachments/assets/defe0858-adb3-4d61-9d2c-87166558fd68"
/>

---------

Co-authored-by: Robin Malfait <malfait.robin@gmail.com>

.github/workflows/prepare-release.yml

@@ -264,6 +264,8 @@ jobs:
 
       - name: Build Tailwind CSS
         run: pnpm run build
+        env:
+          FEATURES_ENV: stable
 
       - name: Run pre-publish optimizations scripts
         run: node ./scripts/pre-publish-optimizations.mjs

.github/workflows/release.yml

@@ -256,6 +256,8 @@ jobs:
 
       - name: Build Tailwind CSS
         run: pnpm run build
+        env:
+          FEATURES_ENV: stable
 
       - name: Run pre-publish optimizations scripts
         run: node ./scripts/pre-publish-optimizations.mjs