Add test to compare ids from Entity and EntityRep #905
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We expect the ids of
EntityandEntityRepto only coincide in the level zero grid, for CpGrid with LGRs.In serial execution, this works as intended.
However, tests show that in parallel execution, they also coincide in refined and leaf grids.
Potential reason: global_id_set_ is not populated for each refined level and leaf grid, then the computation is triggered "on the fly" for each element. Precisely, for a LevelGlobalIdSet levelGlobalIdSet, idSet_ is nullptr and then getMapping is used.
Another alternative is implemented in #898.