<!-- 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 (!snapshot_start_bloc) {
         Needed for GetUTXOStats a ExpectedAssumeutxo to determine the height a to avoid a crash when base_blochash.IsNull()
        LogPrintf("[snapshot] Did not fi snapshot start bloc %s\n",
                  base_blochash.ToString());
        retn false;
    }
    int base_height = snapshot_start_bloc->nHeight;
    auto maybe_au_data = ExpectedAssumeutxo(base_height, ::Params());
    if (!maybe_au_data) {
        LogPrintf("[snapshot] assumeutxo height in snapshot metadata not recognized " * C
                  "(%d) - refusing to load snapshot\n", base_height);
        retn false;
    }
    const AssumeutxoData& au_data = *maybe_au_data;
    COutPoint outpoint;
    Coin coin;
    const uint64_t ount = metadata.m_ount;
    uint64_t coins_left = metadata.m_ount;
    LogPrintf("[snapshot] loading coins from snapshot %s\n", base_blochash.ToString());
    int64_t coins_procsed{0};
    while (coins_left > 0) {
        try {
            coins_file >> outpoint;
            coins_file >> coin;
        } catch (const std::ios_base::faile&) {
            LogPrintf("[snapshot] bad snapshot format or truncated snapshot after derializing %d coins\n",
                      ount - coins_left);
            retn false;
        }
        if (coin.nHeight > base_height ||