[IR] add testdata for dumpKotlinLike

compiler/testData/ir/irText/expressions/funInterface/samConversionInVarargsMixed.kt.txt

@@ -0,0 +1,21 @@
+fun interface MyRunnable {
+  abstract fun run() 
+
+
+
+}
+
+fun test(a: Any, r: MyRunnable) {
+  when {
+    a is MyRunnable -> { //BLOCK
+      foo(rs = [      local fun <anonymous>() {
+        return Unit
+      }
+ /*-> MyRunnable */, r, a /*as MyRunnable */])
+    }
+  }
+}
+
+fun foo(vararg rs: MyRunnable) {
+}
+