os: Truncate on Windows will not create a new file

Truncating a non existent file currently creates a new blank file. This
behavior is not consistent with other OSes where a file not found error
would instead be returned. This change makes Truncate on Windows return
a file-not-found error when the specified file doesn't exist, bringing
the behavior consistent.

Fixes 58977

Author: nwnt

src/os/file_windows.go

@@ -160,7 +160,7 @@ func (f *File) seek(offset int64, whence int) (ret int64, err error) {
 // Truncate changes the size of the named file.
 // If the file is a symbolic link, it changes the size of the link's target.
 func Truncate(name string, size int64) error {
-	f, e := OpenFile(name, O_WRONLY|O_CREATE, 0666)
+	f, e := OpenFile(name, O_WRONLY, 0666)
 	if e != nil {
 		return e
 	}