Avoid multiple anonymous classes created during macro expansion

[luksow]

See: https://github.com/scalalandio/chimney/pull/637/files
or: scala/scala3#16723

I think there're couple of places we should take care of it like: EnumLike, ValueEnumLike, AllGenerators and RootJsonFormat. There're compilation warnings associated, e.g.

[warn] -- [E197] Potential Issue Warning: /home/luksow/iterators/kebs/enumeratum/src/main/scala-3/pl/iterators/kebs/enumeratum/KebsEnumeratum.scala:13:4 
[warn] 13 |    new EnumLike[E] {
[warn]    |    ^
[warn]    |   New anonymous class definition will be duplicated at each inline site
[warn]    |
[warn]    | longer explanation available when compiling with `-explain`