Use withdrawal-addresses from cluster-definition v1.5.0

[dB2510]

Problem to be solved

We are adding support for multiple withdrawal addresses as part of our v1.5.0 cluster definition upgrade. For more details refer this issue. We need to support multiple withdrawal addresses in our workflow while creating deposit-data.json.

Proposed solution

Add support of multiple withdrawal addresses while creating deposit-data.json. We create deposit-data.json at two instances: charon create cluster and charon dkg commands.

• Add flags for taking multiple withdrawal addresses as --withdrawal-addresses which will be an array of strings to charon create cluster and charon create dkg commands.
• --withdrawal-addresses flag should take either one address only or address for each validator len(withdrawal-addresses) == numValidators to avoid support of any other edge case.
• Use withdrawal addresses from cluster-definition to create/sign deposit data corresponding to each validator public key in charon create cluster and charon dkg commands.
• Add unit tests.
• Test all the relevant commands manually.

Out of Scope

If there is anything to highlight as out of scope for this issue, please outline it here.