build: add bitcoin-{node,gui} to Maintenance.cmake

They are added to installable_targets and can optionally be
included in a MULTIPROCESS=1 custom Guix build. This commit
ensures we run the binary security, symbol and dynamic library
checks on them (when present).

cmake/module/Maintenance.cmake

@@ -42,7 +42,7 @@ function(add_maintenance_targets)
     VERBATIM
   )
 
-  foreach(target IN ITEMS bitcoind bitcoin-qt bitcoin-cli bitcoin-tx bitcoin-util bitcoin-wallet test_bitcoin bench_bitcoin)
+  foreach(target IN ITEMS bitcoind bitcoin-node bitcoin-qt bitcoin-gui bitcoin-cli bitcoin-tx bitcoin-util bitcoin-wallet test_bitcoin bench_bitcoin)
     if(TARGET ${target})
       list(APPEND executables $<TARGET_FILE:${target}>)
     endif()