Implement production-ready circuit version

[nkaskov]

We have enough compiler functionality to compile evm node with zkLLVM. Let's adjust the code for circuit mode and remove unnecessary complications such as custom hashes implementation.

As a result of this task, we need to have a fully operational evm node when compiling to x86/ARM. On the other hand, we want to have a full circuit of EVM. To distinguish the code for different targets, ZKLLVM macros can be used. When possible, let's avoid code modifications if it does not affect performance.

• Remove custom implementation of long numbers and hashes #2
• Update tests to be target-agnostic #7
• Add CI testing for crypto3 submodule updates #13
• Arrange the code in more flexible and circuit-friendly manner. #10
• Substitute hashing with circuit-friendly implementation #5
• Adjust secp256k1-based algorithms to be circut-friendly #6
• Substitute intx with multiprecision lib usage #8
• Add en example circuit with ERC20 input #15
• Implement algorithm of public input serialization #16
• (Last) Fetch updates from the evmone upstream #3