Lutris

Add support for detecting Linux 5.16's futex_waitv syscall as fsync support.

Factor out the syscall number getting from _get_futex_syscall_nr into a new function.

- Replaced instances of if not os.path.exists(dst) -> os.makedir(dst) / os.makedirs(dst) with os.makedirs(dst,exist_ok=True) (Python >= 3.2)

- Added nose to dev-dependencies to pyproject.toml

Fixed instances of unreachable code, inconsistent returns, consider-using-with, consider-using-from-import, use-a-generator, consider-using-generator, redundant-u-string-prefix, arguments-renamed