Fix drawer-sheet not respecting start/end placement

[wasinger]

Description

Make .drawer-sheet respect .drawer-start and .drawer-end. Fixes #42754.

Motivation & Context

In the current state of v6-dev, the Sheet drawer works only when aligned to bottom. Aligning to left or right does not work, the drawer is always centered horizontally.

Type of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Refactoring (non-breaking change)
• Breaking change (fix or feature that would change existing functionality)

Checklist

• I have read the contributing guidelines
• My code follows the code style of the project (using npm run lint)
• My change introduces changes to the documentation
• I have updated the documentation accordingly
• I have added tests to cover my changes
• All new and existing tests passed

Live previews

• No live preview available because netlify somehow doesn't work for me...

Related issues

#42754