[TECH DEBT] Update `Dashboard.create_dashboard` signature to match the `LakeviewAPI.create/update` signatures

[JCZuurmond]

The Python SDK v0.37.0 updated the LakeviewAPI.create/update signature to expect a Dashboard object. We can update our lsql Dashboard.create_dashboard with similar changes:

lsql/src/databricks/labs/lsql/dashboards.py

Lines 1103 to 1111 in 48c287e

	def create_dashboard(
	self,
	dashboard_metadata: DashboardMetadata,
	*,
	parent_path: str | None = None,
	dashboard_id: str | None = None,
	warehouse_id: str | None = None,
	publish: bool = False,
	) -> SDKDashboard:

becomes:

    def create_dashboard(
        self,
        dashboard_metadata: DashboardMetadata,
        *,
        dashboard: SDKDashboard=None,
        publish: bool = False,
    ) -> SDKDashboard:

Use deprecation warnings to incrementally introduce this signature change