FIR checker: report SETTER_PROJECTED_OUT

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

@@ -1,13 +0,0 @@
-// !DIAGNOSTICS: -UNREACHABLE_CODE -UNUSED_PARAMETER
-// !CHECK_TYPE
-// t is unused due to KT-4233
-interface Tr<T> {
-    var v: T
-}
-
-fun test(t: Tr<*>) {
-    t.v = null!!
-    t.v = <!ASSIGNMENT_TYPE_MISMATCH!>""<!>
-    t.v = <!NULL_FOR_NONNULL_TYPE!>null<!>
-    t.v checkType { _<Any?>() }
-}

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

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // !DIAGNOSTICS: -UNREACHABLE_CODE -UNUSED_PARAMETER
 // !CHECK_TYPE
 // t is unused due to KT-4233

compiler/testData/diagnostics/tests/generics/varProjection/setterProjectedOutNoPlusAssign.fir.kt

@@ -1,10 +0,0 @@
-// !DIAGNOSTICS: -UNREACHABLE_CODE
-interface Tr<T> {
-    var v: T
-}
-
-fun test(t: Tr<out String>) {
-    // resolved as t.v = t.v + null!!, where type of right operand is String,
-    // so TYPE_MISMATCH: String is not <: of Captured(out String)
-    <!ASSIGNMENT_TYPE_MISMATCH!>t.v += null!!<!>
-}

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

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // !DIAGNOSTICS: -UNREACHABLE_CODE
 interface Tr<T> {
     var v: T