DPL Analysis: first draft for more generic index binding

[aalkin]

• Index columns will now be bound not only to the origin type they were declared with, but also to any compatible (i.e. containing same columns) table type. In data model all indices should refer to the "smallest" origin table type with least columns, to make them more generic.
• Default index getter still uses the declared binding, to get correct binding one needs to use templated version:

using myCol = soa::Join<aod::Collisions, aod::CollisionsExtra>;
auto id = track0.collision_as<myCol>().globalIndex();

[ktf]

Looks good to me. Should we squash?

[aalkin]

@ktf yes please, thank you.