## Description
Fixes#23303.
This PR ensures that the layout editor UI and customization entry points
are hidden and protected when a user lacks the
`SystemPermissionFlag.LAYOUTS` permission flag.
### Changes Made:
1. **`useEnterLayoutCustomizationMode.ts`**: Added
`useHasPermissionFlag(PermissionFlagType.LAYOUTS)` check inside
`enterLayoutCustomizationMode` to return `false` and prevent entering
customization mode if the user lacks permission.
2. **`WorkspaceSection.tsx`**: Updated the sidebar `WorkspaceSection`
component to render the layout edit button (`IconTool`) only when
`hasLayoutsPermission` is `true`.
3. **`ObjectLayout.tsx`**: Disabled customize and reset layout controls
in the Data Model Object Details settings page if the user lacks
`LAYOUTS` permission.
4. **`useEnterLayoutCustomizationMode.test.tsx`**: Added unit tests to
verify that `useEnterLayoutCustomizationMode` correctly guards layout
customization initialization based on permission.
## Testing
- Added unit tests for `useEnterLayoutCustomizationMode` permission
checks.
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Shinu Cherian
b81ca99162
