Populate the candidate set by calling TryAddBlockIndexCandidate on all valid block indices.
Declared in <validation.h>
[[requires_capability(0x7fbc8fb66a68), requires_capability(0x7fbc96bff0d8), requires_capability(0x7fbcaf5d64e8), requires_capability(0x7fbc9e0dccb8)]]
void
PopulateBlockIndexCandidates();