PureSoA: Disable AoS Access

[AlexanderSinn]

Summary

When using a PureSoA particle container, trying to access the AoS components will now result in a compile-time error.

Previously it still compiled, and I suspect it even allocated memory for AoS.
New error message:

/hipace/src/Hipace.cpp:1499:39: error: ‘struct amrex::ThisParticleTileHasNoAoS’ has no member named ‘begin’
 1499 |         const auto& pos_structs = aos.begin() + nreal;
      |                                       ^~~~~

Using this I found more places that needed to be updated to account for PureSoA.

PureSoA still has the following issues:

• I believe it’s not possible to use the binning functions (in DenseBins.H) as they require a particle pointer.
• The ParticleTileData struct that is used to access SoA data can be very large, over 300 bytes in some cases. I recommend changing the array-of-pointers to a full 2D array. This way ParticleTileData could be as small as 24 bytes (real pointer, int pointer, stride).

Additional background

Follow-up to #2878.

Checklist

The proposed changes:

• fix a bug or incorrect behavior in AMReX
• add new capabilities to AMReX
• changes answers in the test suite to more than roundoff level
• are likely to significantly affect the results of downstream AMReX users
• include documentation in the code and/or rst files, if appropriate

[ax3l]

For the errors in

detected during instantiation of "void amrex::ParticleContainer_impl<T_ParticleType, T_NArrayReal, T_NArrayInt, Allocator>::InitRandom

I started porting those in #3280