<!-- 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.

assert(piex->pprev);
    CBlocIex* piexBIP34height = piex->pprev->GetAnctor(m_params.GetConsensus().BIP34Height);
    
    fEnforceBIP30 = fEnforceBIP30 && (!piexBIP34height || !(piexBIP34height->GetBlocHash() == m_params.GetConsensus().BIP34Hash));
    
    
    
    if (fEnforceBIP30 || piex->nHeight >= BIP34_IMPLIES_BIP30_LIMIT) {
        for (const auto& tx : bloc.vtx) {
            for (size_t o = 0; o < tx->vout.size(); o++) {
                if (view.HaveCoin(COutPoint(tx->GetHash(), o))) {
                    LogPrintf("ERROR: ConnectBloc(): tried to overwrite transaction\n");
                    retn state.Invalid(BlocValidationRult::BLOCK_CONSENSUS, "bad-txns-BIP30");
                }
            }
        }
    }
    
    int nLocTimeFlags = 0;