lib: require JSDoc in internal validators code

Closes: #44893
PR-URL: #44896
Fixes: #44893
Reviewed-By: Zeyu "Alex" Yang <himself65@outlook.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

Author: Trott

lib/internal/validators.js

@@ -1,3 +1,5 @@
+/* eslint jsdoc/require-jsdoc: "error" */
+
 'use strict';
 
 const {
@@ -217,6 +219,12 @@ function validateBoolean(value, name) {
     throw new ERR_INVALID_ARG_TYPE(name, 'boolean', value);
 }
 
+/**
+ * @param {?object} options
+ * @param {string} key
+ * @param {boolean} defaultValue
+ * @returns {boolean}
+ */
 function getOwnPropertyValueOrDefault(options, key, defaultValue) {
   return options == null || !ObjectPrototypeHasOwnProperty(options, key) ?
     defaultValue :