FIR2IR: add implicit NOT_NULL cast for @FlexibleNullability type

compiler/testData/codegen/box/casts/javaInterop/nullCheckOnMapGetOrDefault.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 // TARGET_BACKEND: JVM
 // JVM_TARGET: 1.8
 // WITH_RUNTIME

compiler/testData/codegen/box/casts/javaInterop/nullCheckOnMapRemove2.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 // TARGET_BACKEND: JVM
 // JVM_TARGET: 1.8
 // WITH_RUNTIME

compiler/testData/codegen/box/fullJdk/platformTypeAssertionStackTrace.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 // TARGET_BACKEND: JVM
 
 // FULL_JDK

compiler/testData/codegen/box/javaInterop/notNullAssertions/errorMessage.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 // TARGET_BACKEND: JVM
 // FILE: test.kt
 fun f(x: String) = "Fail 1"

compiler/testData/codegen/box/javaInterop/notNullAssertions/nullCheckOnLambdaReturnValue/stringVsTConstrained.kt

@@ -1,5 +1,4 @@
 // TARGET_BACKEND: JVM
-// IGNORE_BACKEND_FIR: JVM_IR
 // FILE: stringVsTConstrained.kt
 fun <T> useTConstrained(xs: Array<T>, fn: () -> T) = fn()
 

compiler/testData/codegen/box/javaInterop/notNullAssertions/staticCallErrorMessage.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 // TARGET_BACKEND: JVM
 // FILE: test.kt
 fun f(x: String) = "Fail 1"

compiler/testData/codegen/bytecodeText/notNullAssertions/arrayListGet.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 import java.util.ArrayList
 
 fun foo(): Any {

compiler/testData/codegen/bytecodeText/notNullAssertions/assertionForNotNullCaptured.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 class A<T> {
     fun add(element: T) {}
 }

compiler/testData/codegen/bytecodeText/nullCheckOptimization/deterministicNotNullChecks.kt

@@ -1,8 +1,4 @@
 // FILE: test/CallableDescriptor.java
-// IGNORE_BACKEND_FIR: JVM_IR
-// Here FIR adds implicit NOT_NULL cast for `origin`, resulting in an assertion being added,
-// which is the correct (yet mismatching) behavior, according to https://youtrack.jetbrains.com/issue/KT-35656
-
 // JVM_IR:
 // Here in 'original in emptySet<D>()' T = '@EnhancedNullability CallableDescriptor' is inferred for 'Iterable<T>.contains(T)'.
 // Using value of '@EnhancedNullability CallableDescriptor' type where '@EnhancedNullability CallableDescriptor' is expected

compiler/testData/codegen/bytecodeText/nullCheckOptimization/expressionValueIsNotNull.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 // FILE: j/J.java
 
 package j;

compiler/testData/codegen/bytecodeText/nullCheckOptimization/expressionValueIsNotNullTwice.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 // FILE: j/J.java
 
 package j;

compiler/testData/codegen/bytecodeText/nullCheckOptimization/notNullExpressionValueTwice_1_4.kt

@@ -1,5 +1,4 @@
 // !API_VERSION: LATEST
-// IGNORE_BACKEND_FIR: JVM_IR
 // FILE: j/J.java
 
 package j;