Revert "replace severity with needsAttention, https://github.com/microsoft/vscode/issues/129037"

This reverts commit e93a59545c.

src/vs/workbench/api/common/extHost.api.impl.ts

@@ -1289,6 +1289,7 @@ export function createApiFactoryAndRegisterActors(accessor: ServicesAccessor): I
 			BranchCoverage: extHostTypes.BranchCoverage,
 			FunctionCoverage: extHostTypes.FunctionCoverage,
 			WorkspaceTrustState: extHostTypes.WorkspaceTrustState,
+			LanguageStatusSeverity: extHostTypes.LanguageStatusSeverity,
 		};
 	};
 }