[NI] Add missing diagnostic on callable references in fake calls

Unresolved reference diagnositc was not reported on callable references
returned from if or when expression because of additional block wrapper.

^KT-30953 Fixed

compiler/testData/diagnostics/tests/resolve/callableReferenceInCST.kt

@@ -0,0 +1,36 @@
+// !LANGUAGE: +NewInference
+// !DIAGNOSTICS: -UNUSED_VARIABLE
+
+fun testWhen(x: Any?) {
+    val y = when (x) {
+        null -> ""
+        else -> ::<!UNRESOLVED_REFERENCE!>unresolved<!>
+    }
+}
+
+fun testWhenWithBraces(x: Any?) {
+    val z = when(x) {
+        null -> { "" }
+        else -> { ::<!UNRESOLVED_REFERENCE!>unresolved<!> }
+    }
+}
+
+fun testIf(x: Any?) {
+    val y = if (x != null) ::<!UNRESOLVED_REFERENCE!>unresolved<!> else null
+}
+
+fun testIfWithBraces(x: Any?) {
+    val z = if (x != null) { ::<!UNRESOLVED_REFERENCE!>unresolved<!> } else { null }
+}
+
+fun testElvis(x: Any?) {
+    val y = x ?: ::<!UNRESOLVED_REFERENCE!>unresolved<!>
+}
+
+fun testExclExcl() {
+    val y = :: <!UNRESOLVED_REFERENCE!>unresolved<!><!NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER, NOT_NULL_ASSERTION_ON_CALLABLE_REFERENCE!>!!<!>
+}
+
+fun testTry() {
+    val v = try { ::<!UNRESOLVED_REFERENCE!>unresolved<!> } catch (e: Exception) {}
+}