[Tests] configure ESLint overrides to parse arbitrary module namespace names

Author: sosukesuzuki

tests/files/.eslintrc

@@ -281,5 +281,22 @@
     "import/no-duplicates": 0,
     "import/no-extraneous-dependencies": 0,
     "import/unambiguous": 0
-  }
+  },
+  "overrides": [
+    // For parsing arbitrary module namespace names
+    {
+      "files": [
+        "default-export-namespace-string.js",
+        "default-export-string.js",
+        "export-default-string-and-named.js",
+        "no-unused-modules/arbitrary-module-namespace-identifier-name-a.js",
+        "no-unused-modules/arbitrary-module-namespace-identifier-name-b.js",
+        "no-unused-modules/arbitrary-module-namespace-identifier-name-c.js"
+      ],
+      "parser": "espree",
+      "parserOptions": {
+        "ecmaVersion": 2022
+      }
+    }
+  ]
 }