Fix eager fetch composite foreign key #11397
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I think #11289 did not completely fix problem for eager fetch.
Change in that PR checked if primary key of target class is composite but that does not matter when loading collection by foreign key.
It should check if foreign key on target class is composite.
Fix from that PR did not work for me because i had entity with regular autogenerated id (single column), but foreign key referenced entity fir composite primary key, like
SecondLevelWithoutCompositePrimaryKey
in this PR.Checking if foreign key is composite fixed the problem for me.