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(0x7fbc8f17acf8), requires_capability(0x7fbca3f04228), requires_capability(0x7fbcace16478), requires_capability(0x7fbca6c580e8), requires_capability(0x7fbcad35f888), requires_capability(0x7fbc9fba1648)]]
void
ScanAndUnlinkAlreadyPrunedFiles();