Provide identity generation for TEXTTABLE and OBJECTTABLE

Extend the functionality FOR ORDINALITY defined on XMLTABLE, to TEXTTABLE and OBJECTTABLE.

This will useful in providing a automatic identity key if the data is being read from sources where there is identity column provided. The faced the issue when loading a text file like

VA,F,1910,Mary,848
VA,F,1911,Mary,747

Where name each line is a separate row, but they do not have unique identifier attached with them. Also helpful with interfaces like OData where they require a PK on a table. This provides an easier alternative.