[Payments] - Add Disputes and Request Payment functionalities (with Polkadot-SDK Virto fork)

[darkforest0202]

This PR completes the initial implementation of the task Pallet payments refactor.

Particularly, this is adding:

Phase 2: Request payment

B agrees to sell a product to A, and B sends an "invoice" that needs to be pay by A (no balance held)
A accept the request by calling accept_and_pay.

Calls:
request_payment
accept_and_pay

Phase 4: Disputes

Phase 4: Disputes

Disputes over a discrepancy over a payment. A buys from B, so B start the dispute.

Agreement in the refund

1. B calls request_refund.
2. A agree and does not dispute, so when timestamp is reached automatically the balance are refunded.

Not agreement path

1. B calls request_refund.
2. A does not agree so executes dispute_refund.
3. Judge resolves the dispute by calling resolve_payment.

Judge can be dynamic by implementing DisputeResolver trait.

Disclaimer: This PR is lacking some important tasks that will be added in future PRs such as:

Set benchmarking for all pallet-payments #306
Optimization. #307
Add inline doc. #308
Configure pallet-payments in the Kreivo Runtime. #309

[olanod]

Made cosmetic changes to reduce nesting, cloning, branching and some naming updates.