[Clippy] Swap open_options to use diagnostic items instead of paths

library/std/src/fs.rs

@@ -466,6 +466,7 @@ impl File {
     /// ```
     #[must_use]
     #[stable(feature = "with_options", since = "1.58.0")]
+    #[cfg_attr(not(test), rustc_diagnostic_item = "file_options")]
     pub fn options() -> OpenOptions {
         OpenOptions::new()
     }
@@ -1009,6 +1010,7 @@ impl OpenOptions {
     /// let mut options = OpenOptions::new();
     /// let file = options.read(true).open("foo.txt");
     /// ```
+    #[cfg_attr(not(test), rustc_diagnostic_item = "open_options_new")]
     #[stable(feature = "rust1", since = "1.0.0")]
     #[must_use]
     pub fn new() -> Self {