builtin: check array.sort_with_compare() arg mismatch (#11385)

vlib/v/checker/tests/array_sort_with_compare_err.out

@@ -0,0 +1,15 @@
+vlib/v/checker/tests/array_sort_with_compare_err.vv:4:26: error: cannot use `fn (string, string) int` as `fn (voidptr, voidptr) int` in argument 1 to `[]string.sort_with_compare`
+    2 |     mut names := ['aaa', 'bbb', 'ccc']
+    3 |
+    4 |     names.sort_with_compare(sort_by_file_base)
+      |                             ~~~~~~~~~~~~~~~~~
+    5 |     println(names)
+    6 |
+Details: ``'s expected fn argument: `` is a pointer, but the passed fn argument: `a` is NOT a pointer
+vlib/v/checker/tests/array_sort_with_compare_err.vv:7:26: error: cannot use `int literal` as `fn (voidptr, voidptr) int` in argument 1 to `[]string.sort_with_compare`
+    5 |     println(names)
+    6 |
+    7 |     names.sort_with_compare(22)
+      |                             ~~
+    8 |     println(names)
+    9 | }

vlib/v/checker/tests/array_sort_with_compare_err.vv

@@ -0,0 +1,13 @@
+fn main() {
+	mut names := ['aaa', 'bbb', 'ccc']
+
+	names.sort_with_compare(sort_by_file_base)
+	println(names)
+
+	names.sort_with_compare(22)
+	println(names)
+}
+
+fn sort_by_file_base(a string, b string) int {
+	return int(a > b)
+}