Speed up unit tests in develop

[mrmr1993]

This PR tweaks the logic in Proof_cache to handle ignore the new fields added for custom gates/chunking. This allows for the same unit test speed-up as we get in compatible.

Checklist:

• Dependency versions are unchanged
  • Notify Velocity team if dependencies must change in CI
• Modified the current draft of release notes with details on what is completed or incomplete within this project
• Document code purpose, how to use it
  • Mention expected invariants, implicit constraints
• Tests were added for the new behavior
  • Document test purpose, significance of failures
  • Test names should reflect their purpose
• All tests pass (CI will check this if you didn't)
• Serialized types are in stable-versioned modules
• Does this close issues? List them

[mrmr1993]

!ci-build-me

[rbonichon]

LGTM