More Dictionary generation of some classes fails on gcc12 due to hiddne decl in modules

[pcanal]

The issue described in #11329 was work-around for the specific case of std::vector<int> being an hidden decl in the regex module (in #11468)

However, this same problem can (will?) happen to any arbitrary class whose decl just happens to be already present as a "hidden" decl inside a dependent module.