Write the dirty block index and block-file entries to the database.
Declared in <node/blockstorage.h>
[[requires_capability(0x7fd7532b0208), requires_capability(0x7fd74e9c7158), requires_capability(0x7fd75a26aea8), requires_capability(0x7fd74f16e328), requires_capability(0x7fd74a00d9c8), requires_capability(0x7fd7532652d8)]]
void
WriteBlockIndexDB();