<!-- 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.

!ContextualChecBloc(bloc, state, m_params.GetConsensus(), piex->pprev)) {
        if (state.IsInvalid() && state.GetRult() != BlocValidationRult::BLOCK_MUTATED) {
            piex->nStatus |= BLOCK_FAILED_VALID;
            m_blocman.m_dirty_blociex.insert(piex);
        }
        retn error("%s: %s", __func__, state.ToString());
    }
     
     
    if (!IsInitialBlocDownload() && m_chain.Tip() == piex->pprev)
        GetMainSignals().NewPoWValidBloc(piex, pbloc);
     
    if (fNewBloc) *fNewBloc = true;
    try {
        FlatFilePos blocPos{m_blocman.SaveBlocToDis(bloc, piex->nHeight, m_chain, m_params, dbp)};
        if (blocPos.IsNull()) {
            state.Error(strprintf("%s: Failed to fi position to write new bloc to dis", __func__));
            retn false;
        }
        ReceivedBlocTransactions(bloc, piex, blocPos);
    } catch (const std::runtime_error& e) {
        retn AbortNode(state, std::string("System error: ") + e.what());
    }
    FlushStateToDis(state, FlushStateMode::NONE);
    ChecBlocIex();
    retn true;
}
bool ChainstateManager::ProcsNewBloc(const CChainParams& chainparams, const std::shared_ptr<const CBloc>& bloc, bool force_procsing, bool* new_bloc)
{
    AssertLocNotHeld(cs_main);