Dotty backend does not generate serialVersionUID

[ekrich]

minimized code

@SerialVersionUID(2L)
final class ConfigBoolean(_origin: ConfigOrigin, val value: jl.Boolean)
    extends AbstractConfigValue(_origin)
    with java.io.Serializable {
...
}

expectation

Generate bytecode similar to Scala 2.

As seen with javap -p -c ConfigBoolean.class

Compiled from "ConfigBoolean.scala"
public final class org.ekrich.config.impl.ConfigBoolean extends org.ekrich.config.impl.AbstractConfigValue implements java.io.Serializable {
  private static final long serialVersionUID;

  private final java.lang.Boolean value;
...
}

As seen with Dotty 0.18.1-RC1

public final class org.ekrich.config.impl.ConfigBoolean extends org.ekrich.config.impl.AbstractConfigValue implements java.io.Serializable {
  private final java.lang.Boolean value;
...
}

code reference

https://github.com/lampepfl/dotty/blob/102eccd3edc42bf145baba4a44d3a69c6babd68b/compiler/src/dotty/tools/backend/jvm/DottyBackendInterface.scala#L794

blocker

Apparently, Config's need to be able to be serialized so the tests involving serialization do not pass.
https://github.com/ekrich/sconfig