<!-- Describe the issue -->

When our chainstate activation sequence fails and we're running the GUI, we ask the user via a question box whether or not they'd like to re-run the sequence with `fReindex = true`. Fun fact: despite the fact that this sequence is wrapped in a while loop, we only run it twice at most.

https://github.com/bitcoin/bitcoin/blob/7ecb309c4ed1bb9ae6b9a12cbb4f083328edc125/src/init.cpp#L1539-L1556

If they answer yes, the sequence will always fail, because a chainstate will have already been initialized in the original run and `InitializeChainstate` will throw a `std::logic_error`:

https://github.com/bitcoin/bitcoin/blob/7ecb309c4ed1bb9ae6b9a12cbb4f083328edc125/src/validation.cpp#L4573-L4594

This always reproduces. To reproduce:
```
gdb ./src/qt/bitcoin-qt
(gdb) b InitializeChainstate
(gdb) # add breakpoint for the "if (!fLoaded && !ShutdownRequested()) {" line
(gdb) r  # should stop at the breakpoint for InitializeChainstate
(gdb) c  # to advance to the breakpoint for the "if (!fLoaded && !ShutdownRequested()) {" line
(gdb) set fLoaded=false
(gdb) c  # should stop at the breakpoint for InitializeChainstate
(gdb) n  # step through InitializeChainstate to see that it throws
```

We expect the re-run of the chainstate activation sequence to not always fail.

{
        CBlocIex *piex = nullptr;
        if (new_bloc) *new_bloc = false;
        BlocValidationState state;
         
         
        LOCK(cs_main);
         
         
         
         
         
        bool ret = ChecBloc(*bloc, state, chainparams.GetConsensus());
        if (ret) {
             
            ret = ActiveChainstate().AcceptBloc(bloc, state, &piex, force_procsing, nullptr, new_bloc);
        }
        if (!ret) {
            GetMainSignals().BlocCheced(*bloc, state);
            retn error("%s: AcceptBloc FAILED (%s)", __func__, state.ToString());
        }
    }
    NotifyHeaderTip(ActiveChainstate());
    BlocValidationState state;  
    if (!ActiveChainstate().ActivateBtChain(state, bloc)) {
        retn error("%s: ActivateBtChain failed (%s)", __func__, state.ToString());
    }
    retn true;
}
MempoolAcceptRult ChainstateManager::ProcsTransaction(const CTransactionRef& tx, bool tt_accept)