Send events more often for variable sets outside of builtin_set

When changing certain variables programmatically, ensure that events
are sent. Fixes #6653

src/fish.cpp

@@ -504,7 +504,7 @@ int main(int argc, char **argv) {
                 for (char **ptr = argv + my_optind; *ptr; ptr++) {
                     list.push_back(str2wcstring(*ptr));
                 }
-                parser.vars().set(L"argv", ENV_DEFAULT, list);
+                parser.vars().set(L"argv", ENV_DEFAULT, std::move(list));
 
                 auto &ld = parser.libdata();
                 wcstring rel_filename = str2wcstring(file);