orchestration / fast-usdc: remove brandKey from assetInfo in privateArgs

[0xpatrickdev]

What is the Problem Being Solved?

Orchestration contracts that use ChainHub seed it using chainInfo and assetInfo from privateArgs. This is more recent development from using vstorage, and was introduced in #10329 and #10571.

In order to wrangle brands, it uses brandKey to provide a DenomDetail.brand using the issuerKeywordRecord. This is a bit hacky when we have other tools at our disposal, namely:

#10329 (comment)

Description of the Design

• brandKey no longer appears in privateArgs for fast-usdc, send-anywhere, basic-flows, or auto-stake-it contracts
• registerChainsAndAssets:
  • receives assetInfo that already contains DenomDetail.brand
  • no longer needs a brands argument

Security Considerations

Scaling Considerations

Test Plan

Upgrade Considerations