fix(e2e-nightwatch): fix eslint config generation (#5148)

Commit 1b64ff8 introduced a nested if in `_eslintrc.js` with the same condition than the wrapping one. This changes the condition to check for TypeScript instead.

Author: cexbrayat

packages/@vue/cli-plugin-e2e-nightwatch/generator/template/tests/e2e/_eslintrc.js

@@ -1,7 +1,7 @@
 <%_ if (hasESLint) { _%>
 module.exports = {
   rules: {
-    <%_ if (hasESLint) { _%>
+    <%_ if (hasTS) { _%>
     '@typescript-eslint/no-var-requires': 'off',
     <%_ } _%>
     'no-unused-expressions': 'off'