Squashed commit of the following:

commit 5a106418
Author: Christopher Dilks <christopher.j.dilks@gmail.com>
Date:   Fri Aug 12 19:12:40 2022 -0400

    modified:   eic_data.yaml

commit 0d8eb515
Author: Christopher Dilks <christopher.j.dilks@gmail.com>
Date:   Fri Aug 12 19:10:15 2022 -0400

    cherry pick CMakeLists from `use-upstream-edm4hep` branch

CMakeLists.txt

@@ -25,7 +25,10 @@ set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
 find_package(ROOT REQUIRED COMPONENTS Core RIO Tree)
 include(${ROOT_USE_FILE})
 
-PODIO_GENERATE_DATAMODEL(eicd eic_data.yaml headers sources OUTPUT_FOLDER ${CMAKE_CURRENT_BINARY_DIR})
+PODIO_GENERATE_DATAMODEL(eicd eic_data.yaml headers sources
+  UPSTREAM_EDM edm4hep:${EDM4HEP_DATA_DIR}/edm4hep.yaml
+  OUTPUT_FOLDER ${CMAKE_CURRENT_BINARY_DIR}
+  )
 
 add_library(eicd SHARED
   ${sources}

eic_data.yaml

@@ -280,7 +280,7 @@ datatypes:
       - eicd::CherenkovThetaAngleMeasurement angles // Evaluated Cherenkov angles for different radiators
     OneToOneRelations:
       ## @TODO: should it be one-to-one?
-      - eicd::ReconstructedParticle associatedParticle // associated reconstructed particle
+      - edm4hep::MCParticle associatedParticle // associated reconstructed particle
 
   ## ==========================================================================
   ## Calorimetry