<!-- 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.

strLoadError = strprintf(_("Witness data for blocks after height %d requires validation. Please restart with -reindex."),
                                         chainparams.GetConsensus().SegwitHeight);
                break;
            case ChainstateLoadingError::SHUTDOWN_PROBED:
                break;
            }
        } else {
            std::optional<ChainstateLoadVerifyError> maybe_verify_error;
            try {
                uiInterface.InitMessage(_("Verifying blocks…").translated);
                auto check_blocks = args.GetIntArg("-checkblocks", DEFAULT_CHECKBLOCKS);
                if (chainman.m_blockman.m_have_pruned && check_blocks > MIN_BLOCKS_TO_KEEP) {
                    LogPrintf("Prune: pruned datadir may not have more than %d blocks; only checking available blocks\n",
                              MIN_BLOCKS_TO_KEEP);
                }
                maybe_verify_error = VerifyLoadedChainstate(chainman,
                                                            fReset,
                                                            fReindexChainState,
                                                            chainparams.GetConsensus(),
                                                            check_blocks,
                                                            args.GetIntArg("-checklevel", DEFAULT_CHECKLEVEL),
                                                            *get__cast<int64_t(*)()>(GetTime));
            } catch (const std::exception& e) {
                LogPrintf("%s\n", e.what());
                maybe_verify_error = ChainstateLoadVerifyError::ERROR_GENERIC_FAILURE;
            }
            if (maybe_verify_error.has_value()) {
                switch (maybe_verify_error.value()) {
                case ChainstateLoadVerifyError::ERROR_BLOCK_FROM_FUTURE:
                    strLoadError = _("The block database contains a block which appears to be from the future. "