don't limit to thread pool when cleaning on startup (#17317)

runtime/src/snapshot_utils.rs

@@ -960,7 +960,7 @@ pub fn bank_to_snapshot_archive<P: AsRef<Path>, Q: AsRef<Path>>(
     assert!(bank.is_complete());
     bank.squash(); // Bank may not be a root
     bank.force_flush_accounts_cache();
-    bank.clean_accounts(true);
+    bank.clean_accounts(true, false);
     bank.update_accounts_hash();
     bank.rehash(); // Bank accounts may have been manually modified by the caller