tools: add support for import assertions in linter

PR-URL: #39924
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Bradley Farias <bradley.meck@gmail.com>
Reviewed-By: Daijiro Wachi <daijiro.wachi@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Zijian Liu <lxxyxzj@gmail.com>

.eslintrc.js

@@ -18,6 +18,7 @@ const hacks = [
   'eslint-plugin-markdown',
   '@babel/eslint-parser',
   '@babel/plugin-syntax-class-properties',
+  '@babel/plugin-syntax-import-assertions',
   '@babel/plugin-syntax-top-level-await',
 ];
 Module._findPath = (request, paths, isMain) => {
@@ -41,6 +42,7 @@ module.exports = {
     babelOptions: {
       plugins: [
         Module._findPath('@babel/plugin-syntax-class-properties'),
+        Module._findPath('@babel/plugin-syntax-import-assertions'),
         Module._findPath('@babel/plugin-syntax-top-level-await'),
       ],
     },