Remove any pruned block & undo files that are still on disk. This could happen on some systems if the file was still being read while unlinked, or if we crash before unlinking.
Declared in <node/blockstorage.h>
[[requires_capability(0x7ff37af16788), requires_capability(0x7ff376b83768), requires_capability(0x7ff37ded1358), requires_capability(0x7ff36c616578), requires_capability(0x7ff37c49a3d8), requires_capability(0x7ff39283cdd8)]]
void
ScanAndUnlinkAlreadyPrunedFiles();