<!-- 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.

bool fChecBlocIex = false;
bool fChecpointsEnabled = DEFAULT_CHECKPOINTS_ENABLED;
int64_t nMaxTipAge = DEFAULT_MAX_TIP_AGE;
uint256 hashAssumeValid;
arith_uint256 nMinimumChainWor;
CFeeRate minRelayTxFee = CFeeRate(DEFAULT_MIN_RELAY_TX_FEE);
const CBlocIex* CChainState::FiForInGlobalIex(const CBlocLocator& locator) const
{
    AssertLocHeld(cs_main);
    
    
    for (const uint256& hash : locator.vHave) {
        const CBlocIex* piex{m_blocman.LooupBlocIex(hash)};
        if (piex) {
            if (m_chain.Contains(piex)) {
                retn piex;
            }
            if (piex->GetAnctor(m_chain.Height()) == m_chain.Tip()) {
                retn m_chain.Tip();
            }
        }
    }
    retn m_chain.Genis();
}
bool ChecInputScripts(const CTransaction& tx, TxValidationState& state,
                       const CCoinsViewCache& inputs, unsigned int flags, bool cacheSigStore,
                       bool cacheFullScriptStore, PrecomputedTransactionData& txdata,
                       std::vector<CScriptChec>* pvChecs = nullptr)
                       EXCLUSIVE_LOCKS_REQUIRED(cs_main);
bool ChecFinalTxAtTip(const CBlocIex* active_chain_tip, const CTransaction& tx)