FIR: Support coercion-to-unit semantics for callable references

compiler/testData/codegen/box/callableReference/adaptedReferences/noAdaptedReferencesIfNoOptimizedReferencesEnabled.kt

@@ -1,5 +1,4 @@
 // TARGET_BACKEND: JVM
-// IGNORE_BACKEND_FIR: JVM_IR
 // WITH_RUNTIME
 // KOTLIN_CONFIGURATION_FLAGS: +JVM.NO_OPTIMIZED_CALLABLE_REFERENCES
 

compiler/testData/codegen/box/callableReference/adaptedReferences/noNameClashForReferencesToSameFunction.kt

@@ -1,5 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
-
 var result = ""
 
 class C(val token: String) {

compiler/testData/codegen/box/callableReference/bound/coercionToUnit.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 // KJS_WITH_FULL_RUNTIME
 // !LANGUAGE: +NewInference
 // WITH_RUNTIME

compiler/testData/codegen/box/callableReference/function/coercionToUnit.kt

@@ -1,5 +1,4 @@
 // !LANGUAGE: +NewInference
-// IGNORE_BACKEND_FIR: JVM_IR
 
 fun foo(s: String): Boolean {
     if (s != "kotlin") throw AssertionError(s)