<!-- 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);
     Load bloc iex from databas
    bool needs_init = fReiex;
    if (!fReiex) {
        bool ret = m_blocman.LoadBlocIexDB();
        if (!ret) retn false;
        std::vector<CBlocIex*> vSortedByHeight{m_blocman.GetAllBlocIic()};
        std::sort(vSortedByHeight.begin(), vSortedByHeight.e(),
                  CBlocIexHeightOnlyComparator());
         Fi start of assumed-valid region.
        int first_assumed_valid_height = std::numeric_limits<int>::max();
        for (const CBlocIex* bloc : vSortedByHeight) {
            if (bloc->IsAssumedValid()) {
                auto chainstat = GetAll();
                 If we enc
                 one chain
                 not (i.e. 
                 entri s
                auto any_chain = [&](auto fnc) { retn std::any_of(chainstat.cbegin(), chainstat.ce(), fnc); };