TSP, TCGC common layer, use TCGC returned description

[haolingdong-msft]

pay attention to Scalar type's description
e.g.

/**
 * Universally Unique Identifier
 *
 * @example
 *
 * ```
 * 123e4567-e89b-12d3-a456-426614174000
 * ```
 */
@format("uuid")
scalar uuid extends string;