[FIR2IR] Fix NoSuchMethod for Iterator::next (same issue with invoke)

compiler/testData/codegen/box/controlStructures/breakContinueInExpressions/kt17384.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 fun returnNullable(): String? = null
 
 inline fun Array<String>.matchAll(fn: (String) -> Unit) {

compiler/testData/codegen/box/controlStructures/kt3574.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 // TARGET_BACKEND: JVM
 
 fun nil() = null

compiler/testData/codegen/box/ranges/javaInterop/javaArrayOfMaybeNullableWithNotNullLoopVariableFailFast.kt

@@ -1,6 +1,5 @@
 // !LANGUAGE: +StrictJavaNullabilityAssertions
 // TARGET_BACKEND: JVM
-// IGNORE_BACKEND_FIR: JVM_IR
 // WITH_RUNTIME
 
 // FILE: box.kt

compiler/testData/codegen/box/secondaryConstructors/withVarargs.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 // TARGET_BACKEND: JVM
 // FILE: WithVarargs.java
 

compiler/testData/codegen/box/vararg/singleAssignmentToVarargsInFunction.kt

@@ -1,5 +1,4 @@
 // !LANGUAGE: -ProhibitAssigningSingleElementsToVarargsInNamedForm
-// IGNORE_BACKEND_FIR: JVM_IR
 
 fun box(): String {
     if (test1(p = 1) != "1") return "fail 1"