Skip sweeping if the guild is not available (#10070)

* Skip sweeping if the guild is not available

* Typo

* Fix formatting

* Fix lint

* Check  if key in guild

* Bwck to guild a ailable

---------

Co-authored-by: Jake Morrison <jake.morrison@pinnsg.com>
Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

packages/discord.js/src/util/Sweepers.js

@@ -425,6 +425,9 @@ class Sweepers {
     let items = 0;
 
     for (const guild of this.client.guilds.cache.values()) {
+      // We may be unable to sweep the cache if the guild is unavailable and was never patched
+      if (!guild.available) continue;
+
       const { cache } = guild[key];
 
       guilds++;