Allow clippy lint in openvasd.

We already allow this lint in scannerlib and have decided not to address
this (for now) when it came up in scannerlib, since it would require
substantial changes to the error handling.

Author: Tehforsch

rust/src/openvasd/main.rs

@@ -1,3 +1,6 @@
+// We allow this fow now, since it would require lots of changes
+// but should eventually solve this.
+#![allow(clippy::large_enum_variant)]
 // SPDX-FileCopyrightText: 2023 Greenbone AG
 //
 // SPDX-License-Identifier: GPL-2.0-or-later WITH x11vnc-openssl-exception