Adapt to Conan 2 - Update Octave client

Summary

Conan 2 requires adjustments to CMakeLists.txt. For the MATLAB/Octave client in particular,

• Removal of basic_conan_setup

Related on cpplib side:

• MR: caosdb-cpplib!49 (merged)
• Issues: caosdb-cpplib#73 (closed) caosdb-cpplib#80 (closed) caosdb-cpplib#82 (closed)