Update interleave lists column for large strings

[davidwendt]

Description

Fixes the compute_string_sizes_and_interleave_lists_fn functor to use column_device_view::element<string_view>() method to access string row contents instead of using the strings offsets. This removes the need to add specific offsetalator logic to the logic.

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.

[mhaseeb123]

LGTM!

[davidwendt]

/merge