<!-- 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.

#include <script/sigcache.h>
#include <shutdown.h>
#include <streams.h>
#include <test/util/net.h>
#include <txdb.h>
#include <util/strencodings.h>
#include <util/string.h>
#include <util/thread.h>
#include <util/threadnames.h>
#include <util/time.h>
#include <util/translation.h>
#include <util/url.h>
#include <util/vector.h>
#include <validation.h>
#include <validationinterface.h>
#include <walletinitinterface.h>
#include <functional>
#include <stdexcept>
using node::BlockAssembler;
using node::CalculateCacheSizes;
using node::LoadChainstate;
using node::RegenerateCommitments;
using node::VerifyLoadedChainstate;
using node::fPruneMode;
using node::fReindex;
const std::function<std::string(const char*)> G_TRANSLATION_FUN = nullptr;
UrlDecodeFn* const URL_DECODE = nullptr;
FastRandomContext g_insecure_rand_ctx;
static FastRandomContext g_insecure_rand_ctx_temp_path;
static uint256 GetUintFromEnv(const std::string& env_name)