[Supplier] refactor: proof store indices

[bryanchriswhite]

Summary

Human Summary

Refactors on-chain proof store to support multiple indices/stores in the multistore (similar to claims): "primary key", "supplier address", and "session end block height".

Issue

• [Protocol] MVP implementation off the on-chain SubmitProof message handling #141
• [Supplier] refactor: claim & proof protobufs + #263
• [Supplier] refactor: supplier module keys #264
• [Supplier] refactor: supplier module errors #265
• [Testing, Tooling] chore: in-memory network interface & config types #289
• [Testing, Tooling] feat: implement in-memory networks #290
• [Testing, Tooling] refactor: in-memory network usage #285
• 👉 THIS PR 👈
• [Supplier] feat: persistence proofs in submit proof msg handler #250

Type of change

Select one or more:

• New feature, functionality or library
• Bug fix
• Code health or cleanup
• Documentation
• Other (specify)

Testing

• Run all unit tests: make go_develop_and_test
• Run E2E tests locally: make test_e2e
• Run E2E tests on DevNet: Add the devnet-test-e2e label to the PR. This is VERY expensive, o only do it after all the reviews are complete.

Sanity Checklist

• I have tested my changes using the available tooling
• I have performed a self-review of my own code
• I have commented my code, updated documentation and left TODOs throughout the codebase

[Olshansk]

Suggested change

	// TODO_TECHDEBT: check if this claim already exists and return an appropriate error
	// TODO_BLOCKER: check if this claim already exists and return an appropriate error

[Olshansk]

Suggested change

	Debug("got sessionId for proof")
	Debug("retrieve on-chain session for proof")

[Olshansk]

Since this is a Debug log, thoughts on adding a bit more data:

`session_id_on_chain`, onchainSession.id,
`session_id_provided`, session.id

[Olshansk]

❤️ comments like this!

[Olshansk]

OPTIONAL NIT: I have the urge to create a helper for this, but not a strong stance.

if !findSupplier(sessionRes.GetSession().GetSuppliers(), supplierAddr) {
    return nil, suppliertypes.ErrSupplierNotFound.Wrapf(
        "supplier address %q not found in session ID %q",
        supplierAddr,
        sessionHeader.GetSessionId(),
    )
}

func findSupplier(suppliers []*SupplierType, addr string) bool {
    for _, supplier := range suppliers {
        if supplier.Address == addr {
            return true
        }
    }
    return false
}

[bryanchriswhite]

Implementation superseded in #327, omitted tests tracked by #141. Closing.