[IR] Fix translation of synthetic generic java properties

- Compute substituted accessor descriptor to avoid unbound type parameters

compiler/testData/codegen/box/ir/genericCompanion.kt

@@ -0,0 +1,22 @@
+
+
+// MODULE: lib
+// FILE: lib.kt
+
+
+class C<T> {
+    fun foo(): String = "OK"
+
+    companion object {
+        fun bar(): C<*> = C<String>()
+    }
+}
+
+
+
+// MODULE: main(lib)
+// FILE: main.kt
+
+fun box(): String {
+    return C.bar().foo()
+}