Code compiling and tests passing with HEMELB_USE_SSE3=OFF

[mobernabeu]

Trying to compile code on my Apple M2 to look into #815

[rupertnash]

Is this making the forcing collisions etc work without SSE? If so, great! I have just received a new MacBook with an M3 chip so can test this once I'm set up for development.

• Tests are failing in CI
• I've tried to move away from using raw pointers and switch to using std::span instead for the parameters

inline static void CalculateForceDistribution(const distribn_t &tau,
                                                      const LatticeVelocity& velocity,
                                                      const LatticeForceVector& force,
                                                      mut_span forceDist)

• I'd prefer the "standard" interface into the velocity set related operations to use the Vector types. Then (at least for not horrible pseudo assembly that is the SSE version) you can write cleaner things like auto vScalarProductF = Dot(velocity, force); instead of your line 477

[mobernabeu]

Thanks for the tip, @rupertnash. I'm bit behind on design choices. This is indeed passing without SSE3 on my M2, but I have buggered up the main build. I'll tidy things up as suggested.

[rupertnash]

I'm happy now