* Fix Retrofit template with Jackson (Fix#8147)
This commit amends the `ApiClient` template for Retrofit. It fixes a bug where the Retrofit client uses Jackson as the serialization library.
Until now, the `ApiClient` could not be compiled when using the Jackson library (default in SpringBoot applications), as the constructor of the class had the following parameter:
`private val serializerBuilder: Builder = Serializer.Builder,`
The change done in the commit, is to ensure that in case of Jackson, the right property of the `Serializer` class is assigned
* Add sample code for `kotlin-jvm-jackson`
This commit adds a sample code for the `kotlin-jvm-jackson` generated code to test the changes on CI
* Update kotlin code samples for CI
This commit only runs the command `bin/generate-samples.sh bin/configs/kotlin-*` to ensure that all code samples are up-to-date and CI can pass successfully.
