PyTorch easyblock fails to properly count total number of test errors

[casparvl]

Just found out from a log posted in easybuilders/easybuild-easyconfigs#16385 that #2794 actually contains a mistake in the regular expressions, due to which the total number of tests errors is not counted correctly:

== 2022-10-12 02:20:36,991 pytorch.py:344 WARNING 0 test failure, 24 test errors (out of 88784):
distributed/pipeline/sync/skip/test_gpipe (12 skipped, 1 warning, 1 error)
distributed/pipeline/sync/skip/test_leak (1 warning, 8 errors)
distributed/pipeline/sync/test_bugs (1 skipped, 1 warning, 3 errors)
distributed/pipeline/sync/test_inplace (2 xfailed, 1 warning, 1 error)
distributed/pipeline/sync/test_pipe (1 passed, 8 skipped, 1 warning, 47 errors)
distributed/pipeline/sync/test_transparency (1 warning, 1 error)
distributions/test_distributions (216 total tests, errors=3, skipped=5)

Clearly, since one test suite already has 47 errors, the total can't be 24. Looking a bit close, the problematic regex is

^.*(?P<errors>[0-9]+) error.*$

Which on this line

distributed/pipeline/sync/test_pipe (1 passed, 8 skipped, 1 warning, 47 errors)

Only matches the 7 (the 4 is matched by the .*).

This can be fixed with

^.*[^0-9](?P<errors>[0-9]+) error.*$

I'll create a PR for that...