Fixes the bug in inline button group where it button don't spread out
when the widget is selected.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
- **Refactor**
- Simplified the `ButtonGroup` component's flex basis style to always be
`"100%"`.
- Streamlined the logic in the `useButtonGroup` function by removing the
`isMeasuring` property and focusing on orientation management.
- **New Features**
- Enhanced feature flag checks to directly return `true` for
"ab_wds_enabled" and "release_anvil_enabled" flags, improving feature
management.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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Co-authored-by: Pawan Kumar <pawankumar@Pawans-MacBook-Pro-2.local>
863214785a