Provide dedicated control over truncation of "short test summary info" lines

What's the problem this feature will solve?

Currently we cannot easily grasp the summary of underlying fails/errors which happened on CIs (logs archived using https://github.com/con/tinuous/) because "short test summary info" truncates to the width of the terminal which is in non-interactive session happens to be around 80. So we get just e.g.

(git)smaug:/mnt/datasets/datalad/ci/logs/2022/08[master]git
$> git grep  '^FAIL.*test_gracefull_dea'                               
03/pr/6915/964b1f4/travis-14378-failed/2.txt:FAILED ../datalad/support/tests/test_parallel.py::test_gracefull_death - asse...
03/pr/6915/964b1f4/travis-14378-failed/4.txt:FAILED ../support/tests/test_parallel.py::test_gracefull_death - assert 0 >= 2
23/pr/6958/fa7cee0/travis-14469-failed/9.txt:FAILED ../datalad/support/tests/test_parallel.py::test_gracefull_death - asse...
29/pr/6981/2551844/travis-14510-failed/3.txt:FAILED ../support/tests/test_parallel.py::test_gracefull_death - assert [0, 2...
30/push/maint/870c72a/travis-14519-failed/9.txt:FAILED ../datalad/support/tests/test_parallel.py::test_gracefull_death - asse...

The only workaround I found is to specify explicitly COLUMNS env var to be of some higher value on CI, but that would make the entire log wider, so wider section headers etc.

Ideally I wish there was some pytest setting which would take and not truncate the first line (i.e. split by \n) of that line to be displayed so in the captured logs we have it in its entirety.

Start by locating pytest's handling of "short test summary info" and terminal-width truncation; the issue does not name specific files or tests. Check how the COLUMNS environment variable affects output, then define a pytest setting that preserves the first line without widening unrelated output and add coverage for the requested behavior.