feat: Rename dataPlaneRoleDefinitions to sqlRoleDefinitions

BREAKING CHANGE: Parameter 'dataPlaneRoleDefinitions' renamed to 'sqlRoleDefinitions' for consistency with 'sqlRoleAssignments' and to clarify it is specific to SQL (NoSQL API) resources.

- Renamed parameter: dataPlaneRoleDefinitions -> sqlRoleDefinitions
- Renamed type: dataPlaneRoleDefinitionType -> sqlRoleDefinitionType
- Updated test files to use new parameter name
- Regenerated README.md with Set-AVMModule

Author: Dongbumlee