[BUG] Create partition should be failed if partition tag existed

[del-zhenwu]

Describe the bug
Partition A has been created, with tag "a", then create another partition with the same tag name "a", create still success

Steps/Code to reproduce behavior

        partition_name = gen_unique_str()
        status = connect.create_partition(table, partition_name, tag)
        assert status.OK()
        new_partition_name = gen_unique_str()
        status = connect.create_partition(table, new_partition_name, tag)
        assert not status.OK()

Expected behavior
create partition failed

Environment details
0.6.0

Screenshots

Additional context

[yhmo]

Fixed by PR426