Accounting rules for eth staking events

[yabirgb]

Currently the eth staking withdrawals respect the accounting rules but is linked to the evm rule. https://discord.com/channels/657906918408585217/1080783409640648765/1209420978728476692

ETH staking events should be taxable in their own.

• [ ] if eth_staking_taxable_after_withdrawal_enabled is set to False then the eth staking events shouldn't be taxable
• [ ] We need to introduce the entry type in the accounting rules. For this we need
  • [ ] A db upgrade to include it in the database for the accounting_rules table
  • [ ] When adding the rules to AccountingRulesManager we should take into consideration this entry type
  • [ ] get_event_settings needs to take into account the type
• [ ] Expose in the API the information for the entry type
• [ ] In the frontend for the rules that have a counterparty we shouldn't add information about the entry type since those are available only for the evm events