FIR2IR: Fix substitution work for context receivers

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

@@ -0,0 +1,29 @@
+// !LANGUAGE: +ContextReceivers
+// TARGET_BACKEND: JVM_IR
+
+class Box<E>(val x: E)
+
+class A<X, Y> {
+    context(Box<X>, Y)
+    fun foo(): String = x.toString() + this@Y.toString()
+
+    context(Box<X>, Y)
+    val p1: String get() = x.toString() + this@Y.toString()
+}
+
+context(Box<X>, Y)
+fun <X, Y> bar(): String = x.toString() + this@Y.toString()
+
+fun box(): String {
+    return with(Box("OK")) {
+        with(56) {
+            val a = A<String, Int>()
+            if (a.foo() != "OK56") return "fail 1"
+            if (a.p1 != "OK56") return "fail 2"
+
+            val b = bar<String, Int>()
+            if (b != "OK56") return "fail 3"
+            return "OK"
+        }
+    }
+}

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

@@ -0,0 +1,18 @@
+// !LANGUAGE: +ContextReceivers
+// TARGET_BACKEND: JVM_IR
+
+class Components(val x: String)
+
+context(Components)
+abstract class A<F : CharSequence>(val y: F) {
+    fun foo(): String = x + y
+}
+
+context(Components)
+class B(y: String) : A<String>(y)
+
+fun box(): String {
+    return with(Components("O")) {
+        B("K").foo()
+    }
+}