supports batch append data validation to the worksheet

[JackMin1314]

It is desirable to have functions that support batch write for data validation, especially useful in dealing with some template data validation.

Now we have those functions releated to the data validation: AddDataValidation(), GetDataValidations(), DeleteDataValidation() and so on. But they are only handled with standalone data validation which has given by the param 'sheet string' and 'dv *DataValidation'. If I want to add many data validations to the sheet, there are some repeated logic process in AddDataValidation.

Maybe we can add new function named BatchAddDataValidation(sheet string, dvs []*DataValidation) to handle quick add and optimized code.

[JackMin1314]

There is no need to add BatchAddDataValidation and it goes against the principle of simplicity and efficiency of the project. This function is not included in the project, so I closed this issues