eth/gasprice: change feehistory input type from int to uint64 (#26922)

Change input param type from int to uint64

internal/ethapi/api.go

@@ -89,7 +89,7 @@ type feeHistoryResult struct {
 
 // FeeHistory returns the fee market history.
 func (s *EthereumAPI) FeeHistory(ctx context.Context, blockCount math.HexOrDecimal64, lastBlock rpc.BlockNumber, rewardPercentiles []float64) (*feeHistoryResult, error) {
-	oldest, reward, baseFee, gasUsed, err := s.b.FeeHistory(ctx, int(blockCount), lastBlock, rewardPercentiles)
+	oldest, reward, baseFee, gasUsed, err := s.b.FeeHistory(ctx, uint64(blockCount), lastBlock, rewardPercentiles)
 	if err != nil {
 		return nil, err
 	}