Function expressions can be now annotated with expression-targeted annotation #KT-9323 Fixed

compiler/testData/diagnostics/tests/annotations/options/functionExpression.kt

@@ -0,0 +1,11 @@
+@Target(AnnotationTarget.EXPRESSION)
+annotation class ExprAnn
+
+@Target(AnnotationTarget.FUNCTION)
+annotation class FunAnn
+
+fun foo(): Int {
+    val x = @ExprAnn fun() = 1
+    val y = @FunAnn fun() = 2
+    return x() + y()    
+}