validator-debt: add distribute-rewards calls after initializing distribution

[karl-dz]

[RedaRahmani]

Hey @karl-dz , are you planning to take this task? If not, I can take it if you want

[karl-dz]

I'll be taking it, thank you for asking

[karl-dz]

Closing this issue. It should live in the contributor rewards process instead: #3004