[FEA] Nested types : Define core classes and structures for variable-sized lists.

[nvdbaranec]

First steps towards nested types functionality has been determined to be implementation of variable-sized list columns. This will provide a good spotlight on what it means to work with nested types and guidance on implementation of further nested types (such as structs).

Suggested types include lists_column_view and list_view, which are analogous to strings_column_view and string_view

Add new type_id for LIST

[nvdbaranec]

Closed with
#4972