Use p.id().is_valid() consistently

[AlexanderSinn]

Summary

This PR applies further cleaning to particles.

The largest change is the replacement of all numeric id comparisons with id().is_valid() and id().make_invlid(). Previously, id() > 0, id() < 0, id() < 1 and id() <= 0 with id() = - id() were used, making the treatment of id == 0 inconsistent (particle ids start at 1 because of this).

Both ptd.m_aos[i] and make_particle<ConstParticleType>{}(ptd, ip); were replaced with ptd[i] which is more concise and works with PureSoA particles.

The PureSoA specialization of numParticlesOutOfRange was removed because the other version also works with PureSoA particles.

Additional background

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

[atmyers]

Thanks!