gh-118598: Improve suggestion of TypeError when attempting to iterate over an integer

[vladimirrotariu]

Corresponding issue: #118598

• Issue: Improve TypeError error message when trying to iterate over an object of type 'int' #118598

[cpython-cla-bot]

All commit authors signed the Contributor License Agreement.

[bedevere-app]

Most changes to Python require a NEWS entry. Add one using the blurb_it web app or the blurb command-line tool.

If this change has little impact on Python users, wait for a maintainer to apply the skip news label instead.

[terryjreedy]

Single quotes within single quotes does not work. Just range(...) or range(<int>) would be better. Change would apply to other patches below.

[hauntsaninja]

Note it looks like there isn't consensus on the issue about the best scope for this message.

Adding this to traceback.py based on substring checks also feels a little broad in my opinion, I'd prefer if error message was changed where it is raised.