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/copilot/src/copilot_completion_provider.rs

@@ -192,7 +192,7 @@ impl EditPredictionProvider for CopilotCompletionProvider {
     fn discard(&mut self, cx: &mut Context<Self>) {
         let settings = AllLanguageSettings::get_global(cx);
 
-        let copilot_enabled = settings.show_inline_completions(None, cx);
+        let copilot_enabled = settings.show_edit_predictions(None, cx);
 
         if !copilot_enabled {
             return;