Celo: CSV export of epoch transactions for address

[fedor-ivn]

On the epoch rewards tab, we should add a Download CSV button. This feature will function similarly to our existing CSV exports for token transfers, internal transactions, and more.

The corresponding API endpoint is: https://celo-alfajores.blockscout.com/api/v1/celo-election-rewards-csv. The query parameters are similar to those used in other endpoints, except that filter_type and filter_value are ignored. Here is an example with supported parameters:

https://celo-alfajores.blockscout.com/api/v1/celo-election-rewards-csv?address_id=0xdcb6702936a4c257c7e715bf780925a93b217e37&from_period=2000-11-11&to_period=2024-11-11