Fix verification in dry runs: alternative take

[georgeee]

Fix verification of fork package.

Develop version: #15599

Explain how you tested your changes:

• [x] Mainnet (on #15591): https://buildkite.com/o-1-labs-2/hardfork-package-generation/builds/280
• [x] Devnet (on #15591): https://buildkite.com/o-1-labs-2/hardfork-package-generation/builds/281
• [x] Mainnet dry run (on #15591): https://buildkite.com/o-1-labs-2/hardfork-package-generation/builds/282

Checklist:

• [x] Dependency versions are unchanged

  • Notify Velocity team if dependencies must change in CI

• [x] Modified the current draft of release notes with details on what is completed or incomplete within this project

• [x] Document code purpose, how to use it

  • Mention expected invariants, implicit constraints

• [x] Tests were added for the new behavior

  • Document test purpose, significance of failures
  • Test names should reflect their purpose

• [x] All tests pass (CI will check this if you didn't)

• [x] Serialized types are in stable-versioned modules

• [x] Does this close issues? List them

• Closes #15577

[mrmr1993]

!ci-build-me

[mrmr1993]

!approved-for-mainnet

[deepthiskumar]

!ci-build-me

[georgeee]

Reviewed change by Jiawei, pushed a tiny fixup to simplify the code

[ghost-not-in-the-shell]

!ci-build-me