[CI] generate separate report files as artifacts (#7995)

* better reports

* a whole bunch of reports in their own files

* clean up

* improvements

* github artifacts experiment

* style

* complete the report generator with multiple improvements/fixes

* fix

* save all reports under one dir to easy upload

* can remove temp failing tests

* doc fix

* some cleanup

examples/conftest.py

@@ -14,3 +14,20 @@ sys.path.insert(1, git_repo_path)
 # silence FutureWarning warnings in tests since often we can't act on them until
 # they become normal warnings - i.e. the tests still need to test the current functionality
 warnings.simplefilter(action="ignore", category=FutureWarning)
+
+
+def pytest_addoption(parser):
+    parser.addoption(
+        "--make_reports",
+        action="store",
+        default=False,
+        help="generate report files - the value will be used as a `report_`+val+`reportname.txt`",
+    )
+
+
+def pytest_terminal_summary(terminalreporter):
+    from transformers.testing_utils import pytest_terminal_summary_main
+
+    make_reports = terminalreporter.config.getoption("--make_reports")
+    if make_reports:
+        pytest_terminal_summary_main(terminalreporter, id=make_reports)