fix: don't assume GetDriveType returns error

GetDriveType does not set an error for GetLastError, see
https://learn.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-getdrivetypea.
Fix some code that assumed this.
Also prefer windows.GetDriveType to a direct call.

disk/disk_windows.go

@@ -19,7 +19,6 @@ import (
 var (
 	procGetDiskFreeSpaceExW     = common.Modkernel32.NewProc("GetDiskFreeSpaceExW")
 	procGetLogicalDriveStringsW = common.Modkernel32.NewProc("GetLogicalDriveStringsW")
-	procGetDriveType            = common.Modkernel32.NewProc("GetDriveTypeW")
 	procGetVolumeInformation    = common.Modkernel32.NewProc("GetVolumeInformationW")
 )
 
@@ -109,15 +108,14 @@ func PartitionsWithContext(ctx context.Context, _ bool) ([]PartitionStat, error)
 			if v >= 65 && v <= 90 {
 				path := string(v) + ":"
 				typepath, _ := windows.UTF16PtrFromString(path)
-				typeret, _, _ := procGetDriveType.Call(uintptr(unsafe.Pointer(typepath)))
-				if typeret == 0 {
-					err := windows.GetLastError()
-					warnings.Add(err)
+				typeret := windows.GetDriveType(typepath)
+				switch typeret {
+				case windows.DRIVE_UNKNOWN:
 					continue
-				}
-				// 2: DRIVE_REMOVABLE 3: DRIVE_FIXED 4: DRIVE_REMOTE 5: DRIVE_CDROM
-
-				if typeret == 2 || typeret == 3 || typeret == 4 || typeret == 5 {
+				case windows.DRIVE_REMOVABLE,
+					windows.DRIVE_FIXED,
+					windows.DRIVE_REMOTE,
+					windows.DRIVE_CDROM:
 					lpVolumeNameBuffer := make([]byte, 256)
 					lpVolumeSerialNumber := int64(0)
 					lpMaximumComponentLength := int64(0)
@@ -134,7 +132,8 @@ func PartitionsWithContext(ctx context.Context, _ bool) ([]PartitionStat, error)
 						uintptr(unsafe.Pointer(&lpFileSystemNameBuffer[0])),
 						uintptr(len(lpFileSystemNameBuffer)))
 					if driveret == 0 {
-						if typeret == 2 || typeret == 4 || typeret == 5 {
+						switch typeret {
+						case windows.DRIVE_REMOVABLE, windows.DRIVE_REMOTE, windows.DRIVE_CDROM:
 							continue // device is not ready will happen if there is no disk in the drive
 						}
 						warnings.Add(err)
@@ -197,9 +196,6 @@ func IOCountersWithContext(_ context.Context, names ...string) (map[string]IOCou
 			path := string(rune(v)) + ":"
 			typepath, _ := windows.UTF16PtrFromString(path)
 			typeret := windows.GetDriveType(typepath)
-			if typeret == 0 {
-				return drivemap, windows.GetLastError()
-			}
 			if typeret != windows.DRIVE_FIXED {
 				continue
 			}