fix: map disabled values to itemValueKey on clearSelected (#3064)

Co-authored-by: Akshat Patel <38994122+Akshat55@users.noreply.github.com>

src/combobox/combobox.component.ts

@@ -694,7 +694,15 @@ export class ComboBox implements OnChanges, AfterViewInit, AfterContentInit, OnD
 		// clearSelected can only fire on type=multi
 		// so we just emit getSelected() (just in case there's any disabled but selected items)
 		const selected = this.view.getSelected();
-		this.propagateChangeCallback(selected);
+
+		// in case there are disabled items they should be mapped according to itemValueKey
+        if (this.itemValueKey && selected) {
+            const values = selected.map((item) => item[this.itemValueKey]);
+            this.propagateChangeCallback(values);
+        } else {
+            this.propagateChangeCallback(selected);
+        }
+
 		this.selected.emit(selected as any);
 		this.clear.emit(event);
 	}