no more default devnet VK; it should now be set manually via GenesisConfiguration during (re)deployment

[alinush]

Description

The genesis VK for Aptos Keyless is either set manually via GenesisConfiguration or defaults to the DEVNET_VERIFICATION_KEY value hardcoded in our Rust code.

However, this default value is no longer useful¹, because when we update the devnet VK in production, a devnet redeployment would later overwrite this update and revert us back to the default VK.

This, in turn, would lock developers outside of their devnet accounts. As result, we'd have to manually run a governance proposal to update the devnet VK after every devnet release.

Therefore, to ensure VK updates persist on devnet, we need to refine our devnet deployment process to fetch the latest VK from somewhere (TBD) and deploy with that in the GenesisConfiguration.

We will work with the @aptos-labs/prod-eng team to refine the devnet release process (either in this PR or another).

TODO: For now, leaving this PR as a draft to see what breaks in CI and to discuss with PE team on best path forward.

How Has This Been Tested?

Not yet tested.

Key Areas to Review

TBD.

Type of Change

• New feature
• Bug fix
• Breaking change
• Performance improvement
• Refactoring
• Dependency update
• Documentation update
• Tests

Which Components or Systems Does This Change Impact?

• Validator Node
• Full Node (API, Indexer, etc.)
• Move/Aptos Virtual Machine
• Aptos Framework
• Aptos CLI/SDK
• Developer Infrastructure
• Move Compiler
• Other (specify)

Checklist

• I have read and followed the CONTRIBUTING doc
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I identified and added all stakeholders and component owners affected by this change as reviewers
• I tested both happy and unhappy path of the functionality
• I have made corresponding changes to the documentation

Footnotes

1. I think the hardcoded devnet VK was useful during the initial keyless development and deployment. ↩

[trunk-io]

⏱️ 1h 39m total CI duration on this PR

Job	Cumulative Duration	Recent Runs
rust-move-tests	14m	🟩
rust-move-tests	14m	🟩
rust-move-tests	13m	🟩
rust-cargo-deny	13m	⬜ 🟩 🟩 🟩 🟩 (+3 more)
rust-move-tests	10m	🟥
rust-move-tests	10m	🟥
check-dynamic-deps	9m	🟩 🟩 🟩 🟩 🟩 (+3 more)
rust-move-tests	5m	⬜
general-lints	4m	🟩 🟩 🟩 🟩 🟩 (+3 more)
semgrep/ci	3m	🟩 🟩 🟩 🟩 🟩 (+3 more)
file_change_determinator	2m	🟩 🟩 🟩 🟩 🟩 (+3 more)
rust-move-tests	1m	⬜
rust-move-tests	51s	⬜
permission-check	24s	🟩 🟩 🟩 🟩 🟩 (+3 more)
permission-check	19s	🟩 🟩 🟩 🟩 🟩 (+3 more)

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