[IR] Fix translation of synthetic generic java properties

- Compute substituted accessor descriptor to avoid unbound type parameters

compiler/testData/ir/irText/expressions/javaSyntheticGenericPropretyAccess.kt

@@ -0,0 +1,15 @@
+// FILE: javaSyntheticGenericPropertyAccess.kt
+fun <F> test(j: J<F>) {
+    j.foo
+    j.foo = 1
+    j.foo++
+    j.foo += 1
+}
+
+// FILE: J.java
+public class J<T> {
+    private int foo = 42;
+
+    public int getFoo() { return foo; }
+    public void setFoo(int x) {}
+}