Fix mods file contains writable view

[Cpaulyz]

Description

When analysing the delete data statement, the deletion of a writable view should be converted to an operation on the original timeseries.

For example:

insert into root.db.d1(time, s1) values(1,1);
flush;
create view root.db.d1.vs1 as select s1 from root.db.d1;
delete from root.db.d1.vs1 where time <= 1;

modfication file should not contain root.db.d1.vs1

[SzyWilliam]

@Cpaulyz You did made a significant change to IoTDB. What a bravo PR!