Merge branch '21.2_LBC_Add' into '21.2'

Adding LumiBlock/LumiBlockComps to AthAnalysis

See merge request !4460

Former-commit-id: 8f1749591669e2ab47c3b9045b3602d1a85d1cb7

Projects/AthAnalysis/package_filters.txt

@@ -175,6 +175,9 @@
 + Event/EventBookkeeperTools
 + Event/EventBookkeeperMetaData
 
+# LumiBlockComps for the LumiBlockMetaDataTool
++ LumiBlock/LumiBlockComps
+
 # Other extras (would very much like to eliminate!) :
 + Event/EventInfo.*
 + Event/EventAthenaPool