KT-6803 Subtyping breaks on star-projections for recursive generics

Star-projections have upper bounds of the form "parameter's bound where all parameter of the same class are substituted with their star-projections"

  #KT-6803 Fixed

compiler/testData/diagnostics/tests/substitutions/starProjections.kt

@@ -0,0 +1,24 @@
+// !CHECK_TYPE
+
+trait A<R, T: A<R, T>> {
+    fun r(): R
+    fun t(): T
+}
+
+fun testA(a: A<*, *>) {
+    a.r().checkType { it : _<Any?> }
+    a.t().checkType { it : _<A<*, *>> }
+}
+
+trait B<R, T: B<List<R>, <!UPPER_BOUND_VIOLATED!>T<!>>> {
+    fun r(): R
+    fun t(): T
+}
+
+fun testB(b: B<*, *>) {
+    b.r().checkType { it : _<Any?> }
+    b.t().checkType { it : _<B<List<*>, *>> }
+
+    b.t().r().size()
+}
+

compiler/testData/diagnostics/tests/substitutions/starProjections.txt

@@ -0,0 +1,20 @@
+package
+
+internal fun testA(/*0*/ a: A<*, *>): kotlin.Unit
+internal fun testB(/*0*/ b: B<*, *>): kotlin.Unit
+
+internal trait A</*0*/ R, /*1*/ T : A<R, T>> {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    internal abstract fun r(): R
+    internal abstract fun t(): T
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+internal trait B</*0*/ R, /*1*/ T : B<kotlin.List<R>, T>> {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    internal abstract fun r(): R
+    internal abstract fun t(): T
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}