[PSI2IR, IR] Support functional types and literals for IR

compiler/testData/codegen/box/extensionFunctions/contextReceivers/fromKEEP/functionalType.kt

@@ -0,0 +1,18 @@
+// !LANGUAGE: +ContextReceivers
+// TARGET_BACKEND: JVM_IR
+// IGNORE_BACKEND_FIR: JVM_IR
+
+class Param
+class O {
+    val o = "o"
+}
+class K {
+    val k = "k"
+}
+
+context(O)
+fun <T> K.f(g: context(O) K.(Param) -> T) = g(this@O, this@K, Param())
+
+fun box() = with(O()) {
+    K().f { o + k }
+}