Windows: Unguarded uses of Python 2 attribute time.clock used in lts-5.15, build fails while removing Python 2

We still see failures in the CI building Qt WebEngine 5.15 when trying to remove Python 2:

build.go:404: File "C:\Users\qt\work\qt\qtwebengine\src\3rdparty\chromium\third_party\mako\mako\compat.py", line 145, in
build.go:404: time_func = time.clock
build.go:404: AttributeError: module 'time' has no attribute 'clock'