Code-generated enums lack lifted methods

[pawelprazak]

The code-generated enums lacks lifted methods, e.g.:

sealed abstract class Region(val name: String, val value: String) extends besom.types.StringEnum

    [error] value value is not a member of besom.internal.Output[besom.api.aws.enums.Region]
    [error]             |    "awslogs-region": "${region.value}",
    [error]                                       ^^^^^^^^^^^^