FIR: Fix test data after making LHS of assignment an expression

KT-54648

compiler/testData/diagnostics/tests/generics/varProjection/setterProjectedOutAssign.kt

@@ -1,7 +1,9 @@
-// FIR_IDENTICAL
 // !DIAGNOSTICS: -UNREACHABLE_CODE -UNUSED_PARAMETER
 // !CHECK_TYPE
 // t is unused due to KT-4233
+
+// FILE: test.kt
+
 interface Tr<T> {
     var v: T
 }
@@ -11,4 +13,18 @@ fun test(t: Tr<*>) {
     <!SETTER_PROJECTED_OUT!>t.v<!> = ""
     <!SETTER_PROJECTED_OUT!>t.v<!> = null
     t.v checkType { _<Any?>() }
-}
+}
+
+fun test2(t: JavaClass<*>) {
+    t.v = null!!
+    t.v = ""
+    t.v = null
+    t.v checkType { _<Any?>() }
+}
+
+// FILE: JavaClass.java
+
+public interface JavaClass<T> {
+    public T getV();
+    public void setV(T v);
+}