### Godot version

4.1.rc3

### System information

Linux 5.10.181-2-MANJARO

### Issue description

`sign(NAN)` and `signf(NAN)` both return `1`. But this doesn't seem right, as `NAN > 0` is false (as all other `NAN` comparison are). These should really return `NAN` not `1`.

### Steps to reproduce

run 
```gdscript
print(sign(NAN), " ", signf(NAN))
```
output is: 
`1 1`

### Minimal reproduction project

N/A
#ifndef _FORCE_INLINE_
#ifdef DEV_ENABLED
#define _FORCE_INLINE_ inline
#else
#define _FORCE_INLINE_ _ALWAYS_INLINE_
#endif
#endif
#ifndef _NO_DISCARD_
#define _NO_DISCARD_ [[nodiscard]]
#endif
#ifndef _ALLOW_DISCARD_
#define _ALLOW_DISCARD_ (void)
#endif
#ifdef _WIN32
#undef min // override standard definition
#undef max // override standard definition
#undef ERROR // override (really stupid) wingdi.h standard definition
#undef DELETE // override (another really stupid) winnt.h standard definition
#undef MessageBox // override winuser.h standard definition
#undef Error
#undef OK
#undef CONNECT_DEFERRED // override from Windows SDK, clashes with Object enum
#endif
#undef ABS
#undef SIGN
#undef MIN
#undef MAX
#undef CLAMP
template <typename T>
constexpr T ABS(T m_v) {