Toolchain for aggregation mode

[nkaskov]

We must add full support for the circuit aggregation mode to the toolchain. This involves both functionality updates and debug info to simplify features debug. The issues to be solved:

• https://github.com/NilFoundation/zkLLVM/issues/177
• https://github.com/NilFoundation/proof-producer/issues/35
• https://github.com/NilFoundation/proof-producer/issues/31
• https://github.com/NilFoundation/proof-producer/issues/54
• https://github.com/NilFoundation/proof-market-toolchain/issues/127
• https://github.com/NilFoundation/proof-market-toolchain/issues/124
• https://github.com/NilFoundation/zkLLVM/issues/489