feat: Update route patterns to use path-to-regexp v8 syntax (#9942)

BREAKING CHANGE: Route pattern syntax across cloud routes and rate-limiting now use the new path-to-regexp v8 syntax; see the [migration guide](https://github.com/parse-community/parse-server/blob/alpha/9.0.0.md) for more details.

src/Config.js

@@ -3,6 +3,7 @@
 // mount is the URL for the root of the API; includes http, domain, etc.
 
 import { isBoolean, isString } from 'lodash';
+import { pathToRegexp } from 'path-to-regexp';
 import net from 'net';
 import AppCache from './cache';
 import DatabaseController from './Controllers/DatabaseController';
@@ -687,6 +688,14 @@ export class Config {
       if (typeof option.requestPath !== 'string') {
         throw `rateLimit.requestPath must be a string`;
       }
+
+      // Validate that the path is valid path-to-regexp syntax
+      try {
+        pathToRegexp(option.requestPath);
+      } catch (error) {
+        throw `rateLimit.requestPath "${option.requestPath}" is not valid: ${error.message}`;
+      }
+
       if (option.requestTimeWindow == null) {
         throw `rateLimit.requestTimeWindow must be defined`;
       }