<!-- 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.

int64_t nCoinCacheUsage,
                                                     bool block_tree_db_in_memory,
                                                     bool coins_db_in_memory,
                                                     std::function<bool()> shutdown_requested,
                                                     std::function<void()> coins_error_cb)
{
    auto is_coinsview_empty = [&](CChainState* chainstate) EXCLUSIVE_LOCKS_REQUIRED(::cs_main) {
        return fReset || fReindexChainState || chainstate->CoinsTip().GetBestBlock().IsNull();
    };
    LOCK(cs_main);
    chainman.InitializeChainstate(mempool);
    chainman.m_total_coinstip_cache = nCoinCacheUsage;
    chainman.m_total_coinsdb_cache = nCoinDBCache;
    UnloadBlockIndex(mempool, chainman);
    auto& pblocktree{chainman.m_blockman.m_block_tree_db};
    
    
    pblocktree.reset();
    pblocktree.reset(new CBlockTreeDB(nBlockTreeDBCache, block_tree_db_in_memory, fReset));
    if (fReset) {
        pblocktree->WriteReindexing(true);
        
        if (fPruneMode)
            CleanupBlockRevFiles();
    }
    if (shutdown_requested && shutdown_requested()) return ChainstateLoadingError::SHUTDOWN_PROBED;