Use dimension/px transformer instead of custom

[lukasoppermann]

Summary

Replace custom transform with upstream equivalent

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 2029a72e4bcf1b926876e6e308fe5f853debd580

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 6 packages

| Name | Type | | ------------------------ | ----- | | @primer/brand-primitives | Patch | | @primer/react-brand | Patch | | @primer/brand-e2e | Patch | | @primer/brand-fonts | Patch | | @primer/brand-config | Patch | | @primer/brand-storybook | Patch |

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[github-actions[bot]]

🔍 Design token changes found

View CSS variable changes

```diff - --brand-VideoPlayer-tooltip-padding: 0.3125rem; + --brand-VideoPlayer-tooltip-padding-inline: 0.3125rem; ``` ```diff + --brand-VideoPlayer-tooltip-padding-block: 0.3125rem; ```

[github-actions[bot]]

🟢 No visual differences found

Our visual comparison tests did not find any differences in the UI.