FIR2IR: Fix case of using context receivers in property initializers

compiler/testData/codegen/box/extensionClasses/contextualPrimaryConstructorWithParams.kt

@@ -1,6 +1,5 @@
 // !LANGUAGE: +ContextReceivers
 // TARGET_BACKEND: JVM_IR
-// IGNORE_BACKEND_FIR: JVM_IR
 // FIR status: context receivers aren't yet supported
 
 class O(val o: String)
@@ -15,4 +14,4 @@ fun box(): String {
         val ok = OK("K")
         ok.result
     }
-}
+}

compiler/testData/codegen/box/extensionClasses/typealiasForContextualClass.kt

@@ -1,6 +1,5 @@
 // !LANGUAGE: +ContextReceivers
 // TARGET_BACKEND: JVM_IR
-// IGNORE_BACKEND_FIR: JVM_IR
 // FIR status: context receivers aren't yet supported
 
 class A {
@@ -15,4 +14,4 @@ class B {
 typealias C = B
 
 fun box(): String =
-    with(A()) { C().result }
+    with(A()) { C().result }

compiler/testData/codegen/box/extensionClasses/useFromAnotherModule.kt

@@ -1,6 +1,5 @@
 // !LANGUAGE: +ContextReceivers
 // TARGET_BACKEND: JVM_IR
-// IGNORE_BACKEND_FIR: JVM_IR
 // FIR status: context receivers aren't yet supported
 
 // MODULE: lib