building: retry mechanism: enable retry on winerror 110

[rokm]

Add winerror 110 (ERROR_OPEN_FAILED) to the list of permissible error codes for the retry mechanism that attempts to mitigate build failures due to anti-virus program interference.

At the same time, reorganize the exception-checking code by merging all Windows specific code into a single branch. This allows us to re-use _ALLOWED_WINERROR with both pywintypes.error and OSError. With the latter, we now compare the winerror attribute as a fall back after errno comparison.

Closes #8138.

[bwoodsend]

Is tests/requirements-libraries.txt missing a pin somewhere? Shouldn't these random Qt regressions only occur during PyUp updates?

[rokm]

Is tests/requirements-libraries.txt missing a pin somewhere? Shouldn't these random Qt regressions only occur during PyUp updates?

We're not pinning the -Qt5 / -Qt6 packages of PyQt5/6 (nor the PySide6-Essentials and PySide6-AddOns for PySide6). We used to have the PyQt5-Qt5 and PyQt6-Qt6 pinned at some point, but I removed those when I added additional PyQt packages (PyQtCharts, PyQt6-QtCharts, etc.), because each of those would also need their own -Qt5/-Qt6 package pinned.

Think I'll re-pin those, though, as well as add pins for all other -Qt5/-Qt6 packages. It's going to be ugly, but PyUp should manage...