Support absolute disabled_globs (#25755)

Closes: #25556

We were always comparing `disabled_globs` against the relative file
path, we'll now use the absolute path if the glob is also absolute.

Release Notes:

- Support absolute globs in `edit_predictions.disabled_globs`

crates/language/src/buffer_tests.rs

@@ -254,6 +254,7 @@ fn file(path: &str) -> Arc<dyn File> {
     Arc::new(TestFile {
         path: Path::new(path).into(),
         root_name: "zed".into(),
+        local_root: None,
     })
 }