Don't hide warnings

[pawelru]

As a package user
In order to troubleshoot warnings / errors
I want to see a warning/error messages that are sometimes hidden
It's fine to create a more meaningful warning/error message at the top but still I think it's useful to see the actual one

This is the function that I have encountered but there are definitely more:
https://github.com/insightsengineering/tern/blob/0feef4aa051d6ea9a030abd2d1cea84427df6f8d/R/utils.R#L416C1-L422