CMTAT version

[rya-sge]

The version used for the PoC will be the version 2.0, see releases/tag/2.0

Remark: a new version will be release soon in the next weeks, but not for the PoC

[rya-sge]

@mh-targens
What is the utility to have the CMTAT contracts in the DVP project ? Can we just delete the directory from this project ? See DVP/tree/main/src/solidity/contracts/CMTAT