Extracted 'deparenthesizeArgument', used it where necessary

#KT-6176 Fixed

compiler/testData/codegen/box/diagnostics/functions/inference/kt6176.kt

@@ -0,0 +1,25 @@
+// !DIAGNOSTICS: -DEBUG_INFO_SMARTCAST
+
+fun <R> foo(f: () -> R): R = f()
+
+fun <T : Any> some(v: T?, b: T): T {
+    return foo {
+        if (v != null) {
+            v
+        }
+        else {
+            b
+        }
+    }
+}
+
+fun <T : Any> some1(v: T?, b: T): T {
+    return foo { if (v != null) v else b }
+}
+
+fun box() = when {
+    some(1, 2) != 1 -> "fail 1"
+    some(null, 2) != 2 -> "fail 2"
+    some1(1, 2) != 1 -> "fail 3"
+    else -> "OK"
+}