test: update integration test snapshot (typescript-eslint#9037)

Author: yeonjuan

packages/integration-tests/tests/__snapshots__/flat-config-types.test.ts.snap

@@ -16,7 +16,7 @@ exports[`flat-config-types eslint should work successfully 1`] = `
         "line": 38,
         "message": "'_otherCases' is defined but never used.",
         "messageId": "unusedVar",
-        "nodeType": "Identifier",
+        "nodeType": null,
         "ruleId": "@typescript-eslint/no-unused-vars",
         "severity": 2,
       },

packages/integration-tests/tests/__snapshots__/recommended-does-not-require-program.test.ts.snap

@@ -11,12 +11,12 @@ exports[`recommended-does-not-require-program eslint should work successfully 1`
     "messages": [
       {
         "column": 7,
-        "endColumn": 19,
+        "endColumn": 10,
         "endLine": 1,
         "line": 1,
         "message": "'foo' is assigned a value but never used.",
         "messageId": "unusedVar",
-        "nodeType": "Identifier",
+        "nodeType": null,
         "ruleId": "@typescript-eslint/no-unused-vars",
         "severity": 2,
       },