[FIR] Temporary change UPPER_BOUND_VIOLATED to warning to unblock bootstrap tests

compiler/fir/analysis-tests/testData/resolve/diagnostics/upperBoundViolated.kt

@@ -66,3 +66,9 @@ class Test8<S8 : Test7<S8, <!UPPER_BOUND_VIOLATED!>in Any<!>>>
 class Class<V : Any>
 typealias Alias <V1> = (Class<V1>) -> Boolean
 
+/* TODO: Should not be errors. Uncomment after fixing of https://youtrack.jetbrains.com/issue/KT-48044
+abstract class Base<T : Base<T>> {}
+class DerivedOut<out O : Base<out O>> {}
+class DerivedIn<in I : Base<in I>> {}*/
+
+

compiler/fir/checkers/checkers-component-generator/src/org/jetbrains/kotlin/fir/checkers/generator/diagnostics/FirDiagnosticsList.kt

@@ -443,7 +443,7 @@ object DIAGNOSTICS_LIST : DiagnosticList("FirErrors") {
         val RECURSION_IN_IMPLICIT_TYPES by error<PsiElement>()
         val INFERENCE_ERROR by error<PsiElement>()
         val PROJECTION_ON_NON_CLASS_TYPE_ARGUMENT by error<PsiElement>()
-        val UPPER_BOUND_VIOLATED by error<PsiElement> {
+        val UPPER_BOUND_VIOLATED by warning<PsiElement> {
             parameter<ConeKotlinType>("expectedUpperBound")
             parameter<ConeKotlinType>("actualUpperBound")
         }

compiler/fir/checkers/gen/org/jetbrains/kotlin/fir/analysis/diagnostics/FirErrors.kt

@@ -309,7 +309,7 @@ object FirErrors {
     val RECURSION_IN_IMPLICIT_TYPES by error0<PsiElement>()
     val INFERENCE_ERROR by error0<PsiElement>()
     val PROJECTION_ON_NON_CLASS_TYPE_ARGUMENT by error0<PsiElement>()
-    val UPPER_BOUND_VIOLATED by error2<PsiElement, ConeKotlinType, ConeKotlinType>()
+    val UPPER_BOUND_VIOLATED by warning2<PsiElement, ConeKotlinType, ConeKotlinType>()
     val UPPER_BOUND_VIOLATED_IN_TYPEALIAS_EXPANSION by error2<PsiElement, ConeKotlinType, ConeKotlinType>()
     val TYPE_ARGUMENTS_NOT_ALLOWED by error0<PsiElement>()
     val WRONG_NUMBER_OF_TYPE_ARGUMENTS by error2<PsiElement, Int, FirRegularClassSymbol>()