KT-53846 Pass context receivers to secondary constructors

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

@@ -1,7 +1,6 @@
 // !LANGUAGE: +ContextReceivers
 // TARGET_BACKEND: JVM_IR
-// IGNORE_BACKEND_K2: JVM_IR, JS_IR
-// FIR status: context receivers aren't yet supported
+// IGNORE_BACKEND_K2: JS_IR
 // WITH_STDLIB
 
 class A(val ok: String)

compiler/testData/codegen/box/extensionFunctions/contextReceivers/kt53846.kt

@@ -0,0 +1,17 @@
+// !LANGUAGE: +ContextReceivers
+// TARGET_BACKEND: JVM_IR
+
+fun box(): String {
+    with(Ctx()) {
+        Foo()
+    }
+    return "OK"
+}
+
+
+context(Ctx)
+class Foo private constructor(i: Int) {
+    constructor() : this(1)
+}
+
+class Ctx