[Bug] Fix validation interface data race

[panleone]

first commit:
Partially backport bitcoin PR bitcoin#18338 which introduce the functions
RegisterSharedValidationInterface and UnregisterSharedValidationInterface. See that PR why using normal pointers is problematic, and how shared_ptr solve the issue
(In a few words the problem is that it can happen that the pointed memory is freed before all signals have been processed, while with shared pointer we are sure that memory will be freed after the last signal is handled)

second commit:
Utilize the new functions to the validation interface BlockStateCatcher. In order to keep everywhere the logic unchanged (Registering on creation and Unregistering when the object goes out of scope) I created the wrapper class BlockStateCatcherWrapper which contains a shared_ptr to BlockStatecatcher.

Those two commits solve the following data race where a BlockStateCatcher pointer is dereferenced after the pointed memory is freed

WARNING: ThreadSanitizer: data race on vptr (ctor/dtor vs virtual call) (pid=6423)
  Write of size 8 at 0x7fc3d7c2d570 by thread T20:
    #0 CValidationInterface::~CValidationInterface() validationinterface.h:75 (pivxd+0xeacac)
    #1 BlockStateCatcher::~BlockStateCatcher() util/blockstatecatcher.h:23 (pivxd+0xeacac)
    #2 generateBlocks(Consensus::Params const&, CWallet*, bool, int, int, int, CScript*) rpc/mining.cpp:78 (pivxd+0x1c1a98)
    #3 generate(JSONRPCRequest const&) rpc/mining.cpp:140 (pivxd+0x1c2215)
    ...

  Previous read of size 8 at 0x7fc3d7c2d570 by thread T35 (mutexes: write M133270, write M132847):
    #0 void std::__invoke_impl<void, void (CValidationInterface::*&)(CConnman*), CValidationInterface*&, CConnman*>(std::__invoke_memfun_deref, void (CValidationInterface::*&)(CConnman*), CValidationInterface*&, CConnman*&&) /usr/include/c++/12/bits/invoke.h:74 (pivxd+0x2eef14)
    #1 std::__invoke_result<void (CValidationInterface::*&)(CConnman*), CValidationInterface*&, CConnman*>::type std::__invoke<void (CValidationInterface::*&)(CConnman*), CValidationInterface*&, CConnman*>(void (CValidationInterface::*&)(CConnman*), CValidationInterface*&, CConnman*&&) /usr/include/c++/12/bits/invoke.h:96 (pivxd+0x2eefbb)
    #2 void std::_Bind<void (CValidationInterface::*(CValidationInterface*, std::_Placeholder<1>))(CConnman*)>::__call<void, CConnman*&&, 0ul, 1ul>(std::tuple<CConnman*&&>&&, std::_Index_tuple<0ul, 1ul>) /usr/include/c++/12/functional:484 (pivxd+0x2eefbb)
    ...

[Duddino]

utACK ddbd4b0

[Liquid369]

tACK ddbd4b0