🏗 Lint forbidden terms from presubmit (#33462)

CI cycles on my PRs are often delayed because I use a forbidden term. It would be much easier if I could correct these uses pre-emptively, so introducing a lint rule can help.

1. Refactors `presubmit-checks.js` so that matches can be returned instead of logged.
2. Introduces eslint rule `local/no-forbidden-terms` that reports results like `amp presubmit`

.eslintrc.js

@@ -140,6 +140,7 @@ module.exports = {
     'local/no-es2015-number-props': 2,
     'local/no-export-side-effect': 2,
     'local/no-for-of-statement': 2,
+    'local/no-forbidden-terms': 2,
     'local/no-function-async': 2,
     'local/no-function-generator': 2,
     'local/no-global': 0,
@@ -320,6 +321,7 @@ module.exports = {
         'require': false,
       },
       'rules': {
+        'local/no-forbidden-terms': 0,
         'local/no-module-exports': 0,
       },
     },

build-system/eslint-rules/no-forbidden-terms.js

@@ -0,0 +1,41 @@
+/**
+ * Copyright 2021 The AMP HTML Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS-IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+const {getForbiddenTerms} = require('../test-configs/forbidden-terms');
+const {relative} = require('path');
+
+/**
+ * @fileoverview
+ * Reports forbidden terms found by regex.
+ * See test-configs/forbidden-terms.js
+ */
+
+module.exports = function (context) {
+  return {
+    Program() {
+      const filename = relative(process.cwd(), context.getFilename());
+      const sourceCode = context.getSourceCode();
+
+      for (const report of getForbiddenTerms(filename, sourceCode.text)) {
+        const {match, message, loc} = report;
+        context.report({
+          loc,
+          message: `Forbidden: "${match}".${message ? `\n${message}.` : ''}`,
+        });
+      }
+    },
+  };
+};