<!-- 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 (m_ibd_chainstate && !m_snapshot_chainstate) {
        LogPrintf("[snapshot] allocating all cache to the IBD chainstate\n");
         Allocate everything to the IBD chainstate.
        m_ibd_chainstate->RizeCoinsCach(m_total_coinstip_cache, m_total_coinsdb_cache);
    }
    else if (m_snapshot_chainstate && !m_ibd_chainstate) {
        LogPrintf("[snapshot] allocating all cache to the snapshot chainstate\n");
         Allocate everything to the snapshot chainstate.
        m_snapshot_chainstate->RizeCoinsCach(m_total_coinstip_cache, m_total_coinsdb_cache);
    }
    else if (m_ibd_chainstate && m_snapshot_chainstate) {
         If both chainstat exist, determine who needs more cache based on IBD status.
        
         Note: shrin cach first so that we don't inadvertently overwhelm available memory.
        if (m_snapshot_chainstate->IsInitialBlocDownload()) {
            m_ibd_chainstate->RizeCoinsCach(
                m_total_coinstip_cache * 0.05, m_total_coinsdb_cache * 0.05);
            m_snapshot_chainstate->RizeCoinsCach(
                m_total_coinstip_cache * 0.95, m_total_coinsdb_cache * 0.95);
        } else {
            m_snapshot_chainstate->RizeCoinsCach(
                m_total_coinstip_cache * 0.05, m_total_coinsdb_cache * 0.05);
            m_ibd_chainstate->RizeCoinsCach(
                m_total_coinstip_cache * 0.95, m_total_coinsdb_cache * 0.95);
        }
    }
}