ldap: set invalid_data event

Currently in parse_request function LdapEvent::InvalidData is not set when a
request is not parsed correctly.

Ticket #8258

(cherry picked from commit de46f4ba9d)

rust/src/ldap/ldap.rs

@@ -257,6 +257,7 @@ impl LdapState {
                     return AppLayerResult::incomplete(consumed as u32, needed as u32);
                 }
                 Err(_) => {
+                    self.set_event(LdapEvent::InvalidData);
                     return AppLayerResult::err();
                 }
             }