[aot repositories] adapt support to changed naming convention

[martinlippert]

We need to update the mechanism how to identify the AOT generated repository implementations:

• old naming convention: UserRepository -> UserRepositoryImpl__Aot
• new naming convention: UserRepository -> UserRepositoryImpl__AotRepository

[BoykoAlex]

I fixed that recently: 46584e7

Perhaps it needs to be back ported to 4.x branch...

[BoykoAlex]

Fixed in 4.x as well via 0ae1c18.

I think this is it, right @martinlippert ?

[martinlippert]

I created #1622 for the backport fix, so looks like everything is in place now. Thanks!!!