Undefined behavior in Plat_IsInDebugSession

Hello,

While debugging the PlayStation build, we noticed undefined behavior in Plat_IsInDebugSession. It seems that the NDA material has been removed but is missing a replacement in the ps5 project.

https://github.com/ValveSoftware/GameNetworkingSockets/blob/partner/src/tier0/dbg.cpp#L121

bool Plat_IsInDebugSession()
{
...
#elif IsPlaystation()
	// NDA material           << does not return any value
#elif IsNintendoSwitch()
	return false;
#else
	#error "HALP"
#endif
}