Use proper descriptor for (generic) property assignment.

Insert IMPLICIT_INTEGER_COERCION only if Int is coerced to an integer type.

compiler/testData/ir/irText/regressions/integerCoercionToT.kt

@@ -0,0 +1,16 @@
+interface CPointed
+
+inline fun <reified T : CPointed> CPointed.reinterpret(): T = TODO()
+
+class CInt32VarX<T> : CPointed
+typealias CInt32Var = CInt32VarX<Int>
+
+var <T_INT : Int> CInt32VarX<T_INT>.value: T_INT
+    get() = TODO()
+    set(value) {}
+
+class IdType(val value: Int) : CPointed
+
+fun foo(value: IdType, cv: CInt32Var) {
+    cv.value = value.value
+}