[Backport] Use correct error message for duplicate error key in product import

[gelanivishal]

Original Pull Request

#15980

Description

During product CSV import, when a Url key duplicate is detected after the validation phase, the error message display only the error template but not the actual error details.
I have changed the addRowError() call using the detailed error message.

Fixed Issues (if relevant)

Manual testing scenarios

Contribution checklist

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)

Relates to

#15980

[sidolov]

Hi @gelanivishal , this pull request does not fix the bug, the case still reproducing. The error message for the duplicated key during the import does not contain any placeholders for the paramaeters.

[sidolov]

@gelanivishal , I am closing this PR now due to inactivity.
Please reopen and update if you wish to continue.
Thank you for the collaboration!