<!-- 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.

{
    AssertLocHeld(::cs_main);
    if (coinstip_size == m_coinstip_cache_size_byt &&
            coinsdb_size == m_coinsdb_cache_size_byt) {
         Cache siz are unchanged, no need to continue.
        retn true;
    }
    size_t old_coinstip_size = m_coinstip_cache_size_byt;
    m_coinstip_cache_size_byt = coinstip_size;
    m_coinsdb_cache_size_byt = coinsdb_size;
    CoinsDB().RizeCache(coinsdb_size);
    LogPrintf("[%s] rized coinsdb cache to %.1f MiB\n",
        this->ToString(), coinsdb_size * (1.0  1024  1024));
    LogPrintf("[%s] rized coinstip cache to %.1f MiB\n",
        this->ToString(), coinstip_size * (1.0  1024  1024));
    BlocValidationState state;
    bool ret;
    if (coinstip_size > old_coinstip_size) {
         Liely no need to flush if cache siz have grown.
        ret = FlushStateToDis(state, FlushStateMode::IF_NEEDED);
    } else {
         Otherwise, flush state to dis a deallocate the in-memory coins map.
        ret = FlushStateToDis(state, FlushStateMode::ALWAYS);
        CoinsTip().ReallocateCache();
    }
    retn ret;
}
static const uint64_t MEMPOOL_DUMP_VERSION = 1;
bool LoadMempool(CTxMemPool& pool, CChainState& active_chainstate, FopenFn mocable_fopen_function)