Test await and yield property names

Co-authored-by: asgerf <316427+asgerf@users.noreply.github.com>

Author: Copilot

javascript/ql/test/library-tests/AwaitPropertyName/AwaitPropertyName.ql

@@ -1,5 +1,4 @@
 import javascript
 
-from Expr e
-where e.toString() = "this expression should not exist"
-select e
+from JSParseError err
+select err

javascript/ql/test/library-tests/AwaitPropertyName/options

@@ -0,0 +1 @@
+semmle-extractor-options: --tolerate-parse-errors

javascript/ql/test/library-tests/AwaitPropertyName/tst.js

@@ -1,5 +1,10 @@
 const pool = { await() { return 42; } };
+const generator = { yield() { return 42; } };
 
 async function issue22499() {
   return await pool.await();
 }
+
+function* yieldPropertyName() {
+  return generator.yield();
+}