Update test262 (#13196)

* chore: update test262 to eca69e2c95972a4c5780ef58fe1f1e53e871b9b1

* test262: add mapping for privateIn

* test262: ignored syntax-free features

Co-authored-by: Huáng Jùnliàng <jlhwung@gmail.com>

scripts/parser-tests/test262/index.js

@@ -9,6 +9,7 @@ const ignoredFeatures = [
   "__getter__",
   "__setter__",
   "AggregateError",
+  "Array.prototype.at",
   "Array.prototype.flat",
   "Array.prototype.flatMap",
   "Array.prototype.item",
@@ -68,6 +69,7 @@ const ignoredFeatures = [
   "Intl.Segmenter",
   "IsHTMLDDA",
   "import.meta",
+  "intl-normative-optional",
   "json-superset",
   "legacy-regexp",
   "let",
@@ -99,6 +101,7 @@ const ignoredFeatures = [
   "SharedArrayBuffer",
   "Set",
   "String.fromCodePoint",
+  "String.prototype.at",
   "String.prototype.endsWith",
   "String.prototype.includes",
   "String.prototype.item",
@@ -126,6 +129,7 @@ const ignoredFeatures = [
   "tail-call-optimization",
   "template",
   "TypedArray",
+  "TypedArray.prototype.at",
   "TypedArray.prototype.item",
   "u180e",
   "Uint8Array",
@@ -143,6 +147,7 @@ const ignoredTests = ["built-ins/RegExp/", "language/literals/regexp/"];
 const featuresToPlugins = {
   "arbitrary-module-namespace-names": "moduleStringNames",
   "class-fields-private": "classPrivateProperties",
+  "class-fields-private-in": "privateIn",
   "class-fields-public": "classProperties",
   "class-methods-private": "classPrivateMethods",
   "class-static-fields-public": "classProperties",