Improve/Fix Antares solver building mecanisms

[JasonMarechal25]

Summary

Recent changes involving the removal of antares-deps have introduced regressions in the Antares solver build process.

Issues Identified

1. Directory Precedence:
   When building the solver, it is being done in an external directory named antares-deps, which is always prepended to CMAKE_PREFIX_PATH. This causes issues when attempting to use a different solver installation later.

Suggested Solution

Allow CMake to manage the download, build, and installation of the solver using FetchContent. This approach would provide more flexibility and avoid the issues caused by the current directory precedence setup.