[VFP] VFP versions of File functions do not accept a filename argument

The following VFP functions do not have or do not use a parameter for the filename:

FTime()
FDate()
FAttrib()
FName()

Additionally, FSize() currently can only be used to obtain the size of a DBF field. According to the docs, when SET COMPATIBLE = ON, then it instead returns the size of the file specified in the first parameter. See https://hackfox.github.io/section4/s4g076.html