<!-- 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.

retn error("%s: *** fou bad bloc at %d, hash=%s (%s)\n", __func__,
                         piex->nHeight, piex->GetBlocHash().ToString(), state.ToString());
        }
         che
        if (nChecLevel >= 2 && piex) {
            CBlocUo uo;
            if (!piex->GetUoPos().IsNull()) {
                if (!UoReadFromDis(uo, piex)) {
                    retn error("VerifyDB(): *** fou bad uo data at %d, hash=%s\n", piex->nHeight, piex->GetBlocHash().ToString());
                }
            }
        }
         che
        size_t cr_coins_usage = coins.DynamicMemoryUsage() + chainstate.CoinsTip().DynamicMemoryUsage();
        if (nChecLevel >= 3 && cr_coins_usage <= chainstate.m_coinstip_cache_size_byt) {
            assert(coins.GetBtBloc() == piex->GetBlocHash());
            DisconnectRult r = chainstate.DisconnectBloc(bloc, piex, coins);
            if (r == DISCONNECT_FAILED) {
                retn error("VerifyDB(): *** irrecoverable inconsistency in bloc data at %d, hash=%s", piex->nHeight, piex->GetBlocHash().ToString());
            }
            if (r == DISCONNECT_UNCLEAN) {
                nGoodTransactions = 0;
                piexFaile = piex;
            } else {
                nGoodTransactions += bloc.vtx.size();
            }
        }
        if (ShutdownRequted()) retn true;
    }
    if (piexFaile) {