WIP: use `gaudi_` macros for inclusion of AlignedAllocator

When building the current Rec TDR packages as part of an lb-dev/lb-use Brunel directory, the top level include_directories(SOAContainer/include) is not picked up. Therefore, I suggest moving the dependency to the package CMakeLists.txt file and declare SOAContainer a proper sub package.

(WIP: just a rough guess how this needs to be coded, tests failing due to concurrent developments)