Support tacokit afterGroup record creation

Currently tacokit afterGroup API is not supported.

See https://github.com/Talend/component-runtime/blob/master/component-runtime-di/src/main/java/org/talend/sdk/component/runtime/di/AutoChunkProcessor.java#L56 for the issue. The need is to be able to emit a record to next elements of the chain from this stage.

It requires to modify a bit the javajet and AutoChunkProcessor (note this is in di module so can be changed as needed by the studio, no need to keep backward compatibility).

Don't hesitate to ping me if you need help on component-runtime side.

The rational is the support of commit-internal/bulk implementations.