JS: more default arguments fixes (KT-24413, KT-21968 fixed)

MPP-related:
* inherited from interfaces
* inherited body from interface
* default arguments in an interface, implemented by a class delegate
* super call of a method with default argument

Also:
* inheritance from an interface and another interface descendant (KT-21968)
* inheritance through an intermediate interface

compiler/testData/codegen/box/defaultArguments/constructor/checkIfConstructorIsSynthetic.kt

@@ -1,6 +1,4 @@
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS, NATIVE
-
+// TARGET_BACKEND: JVM
 // WITH_RUNTIME
 
 class A(value: Int = 1)

compiler/testData/codegen/box/defaultArguments/constructor/manyArgs.kt

@@ -1,6 +1,4 @@
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS, NATIVE
-
+// TARGET_BACKEND: JVM
 // WITH_RUNTIME
 
 class A(val a: Int = 1,