feat(sequencer): Add new validator update action

[ethanoroshiba]

Summary

Changed action ValidatorUpdate to include a name and moved it to our proprietary action types.

Background

Previously, validator names were not stored app-side, and names could only be set in CometBFT genesis.

Changes

• Added name to ValidatorUpdate and moved it from astria_vendored to astria.
• Restricted validator name to 32 characters when converting from on-wire format.
• Added ValidatorNames struct, which contains address <> name key-value pairs.
• Added storage keys, value impls, snapshots, and state read/write methods for ValidatorNames.
• Added new ABCI query for validator name, accepting address as a parameter.
• Edited ValidatorSet to use insert instead of push_update so that it doesn't imply any ordering.

Testing

• Snapshot tests added for new VALIDATOR_NAMES storage key
• Unit tests for new state read/write methods
• Unit tests that new ABCI query works as expected
• Unit test for ABCI query router to validator_name_request.
• App execution test for ValidatorUpdate.

Related Issues

closes #1590

[ethanoroshiba]

Should we explicitly check against chars(), or is 32 bytes fine?

[joroshiba]

Just a note that I thought this might be a bit short, but did some research and I don't think there is any validator in top 100 for celestia with a longer name, so probably fine.

[joroshiba]

Thinking a bit outside the box on breaking changes here:

Technically speaking the ValidatorUpdateV2 action is not a wire breaking change. I think I said we should introduce this as a whole new action, and I still believe we should take ownership over it but fields 1 and 2 are the same. Should we instead just replace the type (will make buf mad I believe because I think I enforced higher level than this for the module than just wire.

But if we do that and don't add a whole new action, we could have this update be built into the oracle upgrade as well and just not do any database state on the name until the fork is triggered? This requires the upgrade logic to be added.

[ethanoroshiba]

Noting that I'm holding off on further work on this until upgrade logic and DB changes are landed.