terminal: add --name-only option to show only names of failed tests

[Vlor999]

What's the problem this feature will solve?

When running large test suites, failed tests often produce a significant amount of output including tracebacks, captured logs, and stdout/stderr. If many tests fail simultaneously, identifying the specific tests that failed becomes difficult as the names are buried under pages of detailed error information. While options like -q or --tb=no exist, they often hide too much information or don't provide the structured "FAILURES" and "ERRORS" sections that help in quickly scanning results.

Describe the solution you'd like

A new command-line option --name-only that modifies the terminal output to only show the names of failed or erring tests.

When enabled:

• The FAILURES section lists only the test names (e.g., test_fail1).
• The ERRORS section lists the error headlines (e.g., ERROR at setup of test_error or ERROR collecting test_file.py).
• All detailed tracebacks and captured output sections are suppressed for these failures.

Example output:

   1 ============================= FAILURES =============================
   2 test_fail1
   3 test_fail2
   4 ====================== short test summary info ======================
   5 FAILED test_file.py::test_fail1 - assert False
   6 FAILED test_file.py::test_fail2 - assert False
   7 ========================= 2 failed in 0.05s =========================

Alternative Solutions

• Using --tb=no or --tb=line: These reduce output but either remove the summary headers entirely or still include error messages that can be quite verbose.
• Piping to grep: Users often pipe pytest output to grep to extract failure names, but this is fragile and loses pytest's color formatting and structural grouping.