Allow fee-payment with proofs

[mrmr1993]

trafficstars

This PR adds the ability to pay fees using a proof as authorisation.

Checklist:

• [ ] 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

[psteckler]

I think the archive db schema/code will need to be updated to reflect the changes here.

[mrmr1993]

Why are there so many changes to the READMEs, buildkite and terraform files?

Don't know, that's just what git merge generated..

[deepthiskumar]

!ci-build-me

[deepthiskumar]

Out-of-scope for berkeley

[mrmr1993]

Stale, and not targeted for the upcoming release. Closing.