* Replace all uses of StrPath, BytesPath, and AnyPath in Python 2 stubs.
* Add StrOrBytesPath as preferred alias for AnyPath.
* Replace all remaining AnyPath instances with StrOrBytesPath.
* Mark AnyPath as obsolete.
Part of #5470
* Mark stdlib modules with upper version bounds
* Add minus to all versions and enforce in check_consistent
* Fix check_consistent and mypy_test to work with new VERSIONS format