dev: optimize CALLDATALOAD with lookup-table based exponentiation

[enitrat]

kakarot-ssj/crates/evm/src/instructions/environmental_information.cairo

Lines 94 to 98 in 6a23ced

	// TODO: optimize once we have dw-based exponentiation
	for _ in 0..32 - bytes_len {
	data_to_load *= 256;
	};
	self.stack.push(data_to_load)

use a POW_2_256 table to optimize this operation