ggml : make ggml_is_view as API (#19539)

* make `ggml_is_view` as API

* introduce `ggml_aux_is_view` as inline version for internal use.

* change `ggml_aux_is_view` to  `ggml_impl_is_view`

ggml/src/ggml.c

@@ -1496,6 +1496,10 @@ bool ggml_are_same_stride(const struct ggml_tensor * t0, const struct ggml_tenso
         (t0->nb[3] == t1->nb[3]);
 }
 
+bool ggml_is_view(const struct ggml_tensor * t) {
+    return ggml_impl_is_view(t);
+}
+
 // check if t1 can be represented as a repetition of t0
 bool ggml_can_repeat(const struct ggml_tensor * t0, const struct ggml_tensor * t1) {
     static_assert(GGML_MAX_DIMS == 4, "GGML_MAX_DIMS is not 4 - update this function");