[IR] Deal with forward references in default argument lambdas.

Rely on the frontend weeding out cases that are not supported.

In psi2ir, introduce all the parameters before processing default
values.

Change the DefaultArgumentStubGenerator to generate code that
matches the behavior of the current backend.

compiler/testData/codegen/box/defaultArguments/useNextParamInLambda.kt

@@ -0,0 +1,16 @@
+// IGNORE_BACKEND: JS, JS_IR
+
+fun f(
+    f1: () -> String = { f2() },
+    f2: () -> String = { "FAIL" }
+): String = f1()
+
+fun box(): String {
+    var result = "fail"
+    try {
+        f()
+    } catch (e : Exception) {
+        result = "OK"
+    }
+    return f(f2 = { "O" }) + f(f1 = { "K" })
+}