fix: Add backward compatibility for expandable table test util (#3667)

Author: Al-Dani

src/test-utils/dom/table/index.ts

@@ -177,7 +177,10 @@ export default class TableWrapper extends ComponentWrapper {
    * @param rowIndex 1-based index of the row.
    */
   findExpandToggle(rowIndex: number): ElementWrapper | null {
-    return this.findNativeTable().find(`tbody tr:nth-child(${rowIndex}) .${expandToggleStyles['expand-toggle']}`);
+    // the file was moved, which changed the hash, so we cannot use old test class anymore.
+    const oldSelector = `tbody tr:nth-child(${rowIndex}) .awsui_expand-toggle_1ss49_1w02f_153`;
+    const newSelector = `tbody tr:nth-child(${rowIndex}) .${expandToggleStyles['expand-toggle']}`;
+    return this.findNativeTable().findAny(oldSelector, newSelector);
   }
 
   /**