Wire `pots/v0` namespace in the cardano-ledger

[qnikst]

We need pots/v0 namespace to be supported in the cardano-ledger code.

In order to achieve that we need:

• ensure that the CDDL types do not contradict with the ledger types (i.e. has all required information, do not have extra information that can be derived)
• on-chain types persist the structure as much as possible (really that should be kept as-is because hashes calculation require exactly the same binary representation)
• for each non BaseType and non on-chain type a proxy is introcuced
• the code follows the structure requirements that would be created during communication with ledger team.

PR with existing work to be ported: IntersectMBO/cardano-ledger#5486

[qnikst]

I start to work on the task. I'll create a PR on the top of the utxo/v0 one. So if any change will be requested to that PR this one will have to be rebased.

[qnikst]

PR is ready for a review: IntersectMBO/cardano-ledger#5552

[qnikst]

PR was updated against the master, and ready for the final review

[qnikst]

During review it appeared that pots/v0 is not part of canonical state as it can be reconstructed from the parts of the state, so instead we will remove this namespace:

• Remove namespace from CIP
• Remove namespace from cardano-cls
• Remove PR from the cardano-ledger
• Verify that coin uses word64 representation

[qnikst]

MR was accepted.