Return INT value for some disk_* operations

### Description Currently (and for who knows how many years), a number of functions responsible for working with the file system return float values ​​instead of integers. Does this seem confusing? A fractional number of bytes? How so? One might assume that in the days of the 32-bit PHP, the integer type wasn't large enough to accommodate the possible disk sizes of the time, but in 2026, this seems absurd. Not to mention that comparing floating-point numbers is an ambiguous operation. Functions that return float values ​​instead of integers are: - https://www.php.net/manual/en/function.disk-free-space.php - https://www.php.net/manual/en/function.disk-total-space.php P.S. The behavior looks especially strange considering that the function `filesize` returns an integer value...