<!-- 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.

: ChainTestingSetup(chainName, extra_args)
{
    const CChainParams& chainparams = Params();
    
    
    RegisterAllCoreRPCCommands(tableRPC);
    auto maybe_load_error = LoadChainstate(fReindex.load(),
                                           *Assert(m_node.chainman.get()),
                                           Assert(m_node.mempool.get()),
                                           fPruneMode,
                                           chainparams.GetConsensus(),
                                           m_args.GetBoolArg("-reindex-chainstate", false),
                                           m_cache_sizes.block_tree_db,
                                           m_cache_sizes.coins_db,
                                           m_cache_sizes.coins,
                                           true,
                                           true);