Use a formula for the number of cores used

[payetvin]

close #2266

[flomnes]

Good ! But then you don't need a std::map then, so please remove it.

uint computeNumberOfCores(uint nbLogicalCores, Antares::Data::NumberOfCoresMode ncMode)
{
switch (ncMode)
{
    case ncMin: return 1;
    case ncLow: return std::ceil(nbLogicalCores / 4.);
    // etc.
}
}

[flomnes]

Could you also add some tests ?

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
92.0% Coverage on New Code
0.0% Duplication on New Code

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