JetDiagnosticsTest migrated to TestGenerator

- test data files renamed from *.jet to *.kt

compiler/testData/diagnostics/tests/regressions/kt604.kt

@@ -0,0 +1,20 @@
+// KT-604 Internal frontend error
+
+trait ChannelPipeline {
+
+}
+
+class DefaultChannelPipeline() : ChannelPipeline {
+}
+
+trait ChannelPipelineFactory{
+    fun getPipeline() : ChannelPipeline
+}
+
+class StandardPipelineFactory(val config:  ChannelPipeline.()->Unit) : ChannelPipelineFactory {
+    override fun getPipeline() : ChannelPipeline {
+        val pipeline = DefaultChannelPipeline()
+        pipeline.config ()
+        return pipeline
+    }
+}