Fix num validators in neard INFO stats log summary to include chunk only producers

[anthony-near]

Fix for issue: https://github.com/near/nearcore/issues/7780

For epoch id: 7STQ9NZ61UCw6ec4DYoWRAuhUKFjLsq6nAaZT4f3bWpy From go/mainnet-debug (screenshot below): Num Validators (126) = chunk only producing validators (26) + block producing validators (100) (which also produce chunks) In code: num_validators = chunk_validators.len() (since both chunk only and block producing validators produce chunks)

Updated to include output for the number of chunk only validators - see local node output screenshot.

Validated fix on local node (see node output screenshot).

[mina86]

I think we should show both numbers. Perhaps as 100+17 validators?

[mina86]

I must say though I’m not a fan of linking to screenshots in commit messages. I’m especially not a fan of making screenshots of plain text logs.

[akhi3030]

I believe this PR is not being actively worked on.