Remove deprecated SuggestGasPrice from codebase

[gacevicljubisa]

Remove deprecated SuggestGasPrice from codebase or replace it with logic used like in suggestedFeeAndTip method

func (t *transactionService) suggestedFeeAndTip(ctx context.Context, gasPrice *big.Int, boostPercent int) (*big.Int, *big.Int, error) {
	gasTipCap, err := t.backend.SuggestGasTipCap(ctx)
	if err != nil {
		return nil, nil, err
	}

	multiplier := big.NewInt(int64(boostPercent) + 100)
	gasTipCap = new(big.Int).Div(new(big.Int).Mul(gasTipCap, multiplier), big.NewInt(100))

	minimumTip := big.NewInt(MinimumGasTipCap)
	if gasTipCap.Cmp(minimumTip) < 0 {
		gasTipCap = new(big.Int).Set(minimumTip)
	}

	var gasFeeCap *big.Int

	if gasPrice == nil {
		latestBlockHeader, err := t.backend.HeaderByNumber(ctx, nil)
		if err != nil {
			return nil, nil, fmt.Errorf("failed to get latest block: %w", err)
		}

		if latestBlockHeader.BaseFee == nil {
			return nil, nil, ErrEIP1559NotSupported
		}

		// gasFeeCap = (2 * baseFee) + gasTipCap
		gasFeeCap = new(big.Int).Add(
			new(big.Int).Mul(latestBlockHeader.BaseFee, big.NewInt(2)),
			gasTipCap,
		)
	} else {
		gasFeeCap = new(big.Int).Set(gasPrice)
	}

	if gasTipCap.Cmp(gasFeeCap) > 0 {
		t.logger.Warning("gas tip cap is higher than gas fee cap, using gas fee cap as gas tip cap", "gas_tip_cap", gasTipCap, "gas_fee_cap", gasFeeCap)
		gasTipCap = new(big.Int).Set(gasFeeCap)
	}

	t.logger.Debug("prepare transaction", "gas_max_fee", gasFeeCap, "gas_max_tip", gasTipCap)

	return gasFeeCap, gasTipCap, nil
}

[0xCardiE]

Happy to see this, we should have all trx or trx estimates use improved code.