Devs SBAT create governance proposal to upgrade changed contracts

[timmoreton]

Expected Behavior

Detect changes, deploy new contracts, create a governance proposal that repoints proxies at new contracts.

Current Behavior

Governance now owns Proxy contracts, so yarn run upgrade no longer works to upgrade contract changes on specified network. (The script at packages/protocol/scripts/truffle/upgrade.ts is outdated, as it assumes the MultiSig contract is deployed. However, we don't deploy it anymore, so the script breaks.)

[yorhodes]

2 options:

1. use hotfixes
2. use governance proposals

Analysis:

• hotfixes have fewer timing dependencies compared to governance proposal phases
• hotfixes might seem centrally unilateral from an optics perspective

Concrete steps:

1. migrate functionality from protocol upgrade script to contractkit for constructing proxy logic update transaction
2. add functionality to contractkit Governance wrapper for <encoding/hashing> transaction and submitting <proposal/hotfix>
3. add validator commands to CLI for interacting with governance <hotfix/proposals>
4. migrate functionality from protocol upgrade script to for detecting changes between network bytecode and local bytecode and performing upgrade via CLI/contractkit

[yorhodes]

closing due to #2142 being merged