[Mgmt][HLC] doesn't generate correct mapper for those renamed parameter because of reserved words.

[qiaozha]

For example the parameter we have for this checkNameAvailibitity is

  /**
   * Description for Check if a resource name is available.
   * @param name Resource name to verify.
   * @param typeParam Resource type used for verification.
   * @param options The options parameters.
   */
  checkNameAvailability(
    name: string,
    typeParam: CheckNameResourceTypes,
    options?: CheckNameAvailabilityOptionalParams
  ): Promise<CheckNameAvailabilityResponse> {
    return this.sendOperationRequest(
      { name, typeParam, options },
      checkNameAvailabilityOperationSpec
    );
  }

Here the typeParam is renamed from the reserved word type. but in the generated Mappers.

export const ResourceNameAvailabilityRequest: coreClient.CompositeMapper = {
  serializedName: "ResourceNameAvailabilityRequest",
  type: {
    name: "Composite",
    className: "ResourceNameAvailabilityRequest",
    modelProperties: {
      name: {
        serializedName: "name",
        required: true,
        xmlName: "name",
        type: {
          name: "String"
        }
      },
      type: {
        serializedName: "type",
        required: true,
        xmlName: "type",
        type: {
          name: "String"
        }
      },
      isFqdn: {
        serializedName: "isFqdn",
        xmlName: "isFqdn",
        type: {
          name: "Boolean"
        }
      }
    }
  }
};

we are still seeing type as the key, which cause the generated code can't work

This is original come from our customer reported Azure/azure-sdk-for-js#20728