<!-- 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.

break;
        }
        if (block.vtx.empty() || !block.vtx[0]->IsCoinBase()) {
            std::cerr << "Block does not start with a coinbase" << std::endl;
            break;
        }
        uint256 hash = block.GetHash();
        {
            LOCK(cs_main);
            const CBlockIndex* pindex = chainman.m_blockman.LookupBlockIndex(hash);
            if (pindex) {
                if (pindex->IsValid(BLOCK_VALID_SCRIPTS)) {
                    std::cerr << "duplicate" << std::endl;
                    break;
                }
                if (pindex->nStatus & BLOCK_FAILED_MASK) {
                    std::cerr << "duplicate-invalid" << std::endl;
                    break;
                }
            }
        }
        {
            LOCK(cs_main);
            const CBlockIndex* pindex = chainman.m_blockman.LookupBlockIndex(block.hashPrevBlock);
            if (pindex) {
                UpdateUncommittedBlockStructures(block, pindex, chainparams.GetConsensus());
            }
        }
        
        class submitblock_StateCatcher final : public CValidationInterface