Create test_termios.py #110380
Description
Feature or enhancement
In #110366 we found several bugs in termios.c module.
But, right now they are not tested.
I propose to add a new test file that can at least cover some regressions that are easy to do.
For example, checking error overwrite or crash from #110366
It is better than nothing, later people more familiar with termios can add more tests and infrastructure to test more advanced things.
I am working on the PR. Expect it tomorrow or something.