create new cluster lock version v1.8

[xenowits]

🎯 Problem to be solved

We want to add the partial deposits feature in charon.

Partial deposits is the feature where operators can create clusters with arbitrary validator deposit amounts (not necessarily 32ETH).

For example, an entity would like to create a validator with 3 partial deposit data files: 20ETH, 10ETH & 2 ETH. We don’t support this functionality now and only create full deposit data of 32ETH per validator.

🛠️ Proposed solution

• [ ✅ ] Approved design doc: https://docs.google.com/document/d/1S2HrktE8IXvY6hika8pWPbzMiACbRobEONL1l7El4c4/edit#heading=h.alakie8lxcfb
• [ ✅ ] Core team consensus on the proposed solution

• Add a new version v1.8 for cluster locks.
• Add a new field DepositAmounts to cluster definition (cluster/definition.go):

{
...
   "threshold":3,
   "deposit_amounts":[		<-- NEW
"200000000000",	// 20 ETH
"100000000000",	// 10 ETH
"20000000000"	// 02 ETH
],
   "validators":[
      {
         "fee_recipient_address":"0x52f...74d",
         "withdrawal_address":"0x818...2c4",		
      },
      {
         "fee_recipient_address":"0xeb9...a25",
         "withdrawal_address":"0x5fb...e7c",
      }
   ],
   "dkg_algorithm":"default"
...
}

• See the constraints for the DepositAmounts field here.

🧪 Tests

• Tested by new automated unit/integration/smoke tests
• Manually tested on core team/canary/test clusters
• Manually tested on local compose simnet