Throw copy exception when num of columns in files are not matched with num of properties in table schema

[ray6080]

We should throw an exception when the num of columns in files are not expected, i.e., not matched with the num of properties defined in table schema.

[acquamarin]

I think the arrow parser will throw an exception if the number of columns doesn't match:
e.g.
EXPECTED ERROR: Copy exception: Invalid: CSV parse error: Expected 3 columns, got 15: 0,Alice,1,true,false,35,5.0,1900-01-01,2011-08-20 11:25:30Z+00:00,3 years 2 days 13 hours 2 minu ...

[LowLevelMahn]

I think the arrow parser will throw an exception if the number of columns doesn't match

but the table schema should be valid before - i wouldn't rely on the implementation detail of arrow here
especially when there were (if im correct) talks to remove the arrow dependency someday