Merge bitcoin/bitcoin#22657: fuzz: Re-enable assert in banman again

fabed98 fuzz: Re-enable assert in banman again (MarcoFalke)

Pull request description:

  Looks like this was accidentally fixed by removing the buggy code in commit efd6f90

ACKs for top commit:
  hebasto:
    ACK fabed98

Tree-SHA512: 2dea5dad48ff2050ae7086c1c6306c40f650e9629918e79adc54164a375d777a70b29f5a480566dc6430f07ce33dfe703fc5d45a20125584b4a026c5832198a2

Author: MarcoFalke

src/test/fuzz/banman.cpp

@@ -108,9 +108,7 @@ FUZZ_TARGET_INIT(banman, initialize_banman)
             BanMan ban_man_read{banlist_file, /* client_interface */ nullptr, /* default_ban_time */ 0};
             banmap_t banmap_read;
             ban_man_read.GetBanned(banmap_read);
-            // Assert temporarily disabled to allow the remainder of the fuzz test to run while a
-            // fix is being worked on. See https://github.com/bitcoin/bitcoin/pull/22517
-            (void)(banmap == banmap_read);
+            assert(banmap == banmap_read);
         }
     }
     fs::remove(banlist_file.string() + ".json");