Reduce block_rewards in the catchup fetcher

Fixes #1584

If one address is rewarded for two different uncles in one block,
cardinality violation occured due to rewards not being reduced.
The reducing function from Block.Rewards.Fetcher is now reused in
Block.Fetcher.

apps/indexer/lib/indexer/block/fetcher.ex

@@ -14,7 +14,7 @@ defmodule Indexer.Block.Fetcher do
   alias Indexer.{AddressExtraction, CoinBalance, MintTransfer, ReplacedTransaction, Token, TokenTransfers, Tracer}
   alias Indexer.Address.{CoinBalances, TokenBalances}
   alias Indexer.Block.Fetcher.Receipts
-  alias Indexer.Block.Transform
+  alias Indexer.Block.{Reward, Transform}
 
   @type address_hash_to_fetched_balance_block_number :: %{String.t() => Block.block_number()}
 
@@ -127,7 +127,10 @@ defmodule Indexer.Block.Fetcher do
              transactions_params: transactions_with_receipts
            }
            |> CoinBalances.params_set(),
-         beneficiaries_with_gas_payment <- add_gas_payments(beneficiary_params_set, transactions_with_receipts),
+         beneficiaries_with_gas_payment <-
+           beneficiary_params_set
+           |> add_gas_payments(transactions_with_receipts)
+           |> Reward.Fetcher.reduce_uncle_rewards(),
          address_token_balances = TokenBalances.params_set(%{token_transfers_params: token_transfers}),
          {:ok, inserted} <-
            __MODULE__.import(

apps/indexer/lib/indexer/block/reward/fetcher.ex

@@ -204,7 +204,7 @@ defmodule Indexer.Block.Reward.Fetcher do
     end)
   end
 
-  defp reduce_uncle_rewards(beneficiaries_params) do
+  def reduce_uncle_rewards(beneficiaries_params) do
     beneficiaries_params
     |> Enum.reduce([], fn %{address_type: address_type} = beneficiary, acc ->
       current =