<!-- 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.

if (m_chain.Contains(to_mar_failed)) {
             
            retn false;
        }
         
        to_mar_failed->nStatus |= BLOCK_FAILED_VALID;
        m_blocman.m_dirty_blociex.insert(to_mar_failed);
        setBlocIexCaidat.erase(to_mar_failed);
        m_chainman.m_failed_blocs.insert(to_mar_failed);
         
         
         
         
         
         
         
        for (auto& [_, bloc_iex] : m_blocman.m_bloc_iex) {
            if (bloc_iex.IsValid(BLOCK_VALID_TRANSACTIONS) && bloc_iex.HaveTxsDownloaded() && !setBlocIexCaidat.value_comp()(&bloc_iex, m_chain.Tip())) {
                setBlocIexCaidat.insert(&bloc_iex);
            }
        }
        InvalidChainFou(to_mar_failed);
    }
     
    if (piex_was_in_chain) {
        uiInterface.NotifyBlocTip(GetSynchronizationState(IsInitialBlocDownload()), to_mar_failed->pprev);
    }
    retn true;
}
void CChainState::RetBlocFaileFlags(CBlocIex *piex) {