fix(types): abci valset update abci does not need a public key on replay

[lklimek]

Issue being fixed or feature implemented

Tenderdash requires validator set updates to contain public keys of all validators.
However, this should not be required, as in some scenarios (like replay) these
pubkeys are not available.

What was done?

Validators in validator set no longer require public key.

How Has This Been Tested?

On testnet, when got the failure, with the following procedure:

dashmate config set --config testnet platform.drive.tenderdash.docker.image dashpay/tenderdash:fix-validator-update-without-pubkey
dashmate stop --platform
dashmate reset --platform
dashmate start --platform

Breaking Changes

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated relevant unit/integration/functional/e2e tests
• I have made corresponding changes to the documentation

For repository code-owners and collaborators only

• I have assigned this pull request to a milestone

[shumkov]

Good job!