NI: do type checking for anonymous functions not inside a call

^KT-38890 Fixed
^KT-38439 Fixed

compiler/testData/diagnostics/tests/inference/completion/anonymousFunction.fir.kt

@@ -0,0 +1,24 @@
+// !LANGUAGE: +NewInference
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
+fun take(fn: () -> List<String>) {}
+fun <L> inferFromLambda(fn: () -> L): L = TODO()
+fun <L> inferFromLambda2(fn: (Int) -> L): L = TODO()
+
+fun <T> materialize(): T = TODO()
+fun <I> id(arg: I) = arg
+
+fun testFunctions() {
+    take { materialize() }
+    take(fun() = materialize())
+    take(fun(): List<String> = materialize())
+    take(fun(): List<String> {
+        return materialize()
+    })
+}
+
+fun testNestedCalls() {
+    id<String>(inferFromLambda { materialize() })
+    id<String>(inferFromLambda(fun() = materialize()))
+    id<String>(inferFromLambda2(fun() = materialize()))
+}