feat(protos): add auction result to bundle protos

[itamarreif]

Summary

This PR adds the auction result definition to the bundle api protos.

Background

The auctioneer chooses a winning bundle which it needs to submit in a RollupDataSubmission to the sequencer. The winning bundle needs to be signed first, and this PR adds a wrapper object that includes the signature and public key required to verify the signature was done by the correct Auctioneer.

Changes

• Add AuctionResult defintion to the bundle api

Changelogs

• Added AuctionResult definition to the bundle api protos

Related Issues

closes #1790

[SuperFluffy]

I have to walk back my suggestion for calling this a Result because it would clash with a regular Rust Result: Result<AuctionResult, E>.

Let's go with WinningBundle instead?

[joroshiba]

I think it's probably fine to just call this a SignedBundle? That's what it is and provides a more generic option. IE this could allow it to be a bundle generated and signed by a TEE and submitted.

The fact that this signer indicates it is a Auction Result bundle is an implementation detail for the rollup?

[joroshiba]

After discussion online, I'm ok with allocation.

Long term we will want something generic for signed data probably.

[SuperFluffy]

Setting this to requesting changes to make it clear that this PR was reviewed and needs further action.

[itamarreif]

Changed the name of the envelope type to Allocation, following the terminology in auction theory (i.e. the auctioneer decides on an allocation).

[SuperFluffy]

I think we want to follow sequencer's Transaction and make this an opaque Any type so that we need not worry about differences in protobuf encoders.