Fix Intel module creation
This PR will fix the creation of the intel module. The second time the script runs, the intel
directory is already created and the script will wrongly copy the intel-oneapi-compilers-classic
directory into the intel
directory. The new strategy implemented in this PR will fix this behaviour.
This PR also defines the INTEL_ROOT
environment variable (with the same value as INTEL_ONEAPI_COMPILERS_CLASSIC_ROOT
).