ggml : add a set of functions for checking contiguity of inner tensor dimensions (llama/25650)

Co-authored-by: Stanisław Szymczyk <sszymczy@gmail.com>

ggml/include/ggml.h

@@ -780,6 +780,10 @@ extern "C" {
     GGML_API bool ggml_is_contiguous_1(const struct ggml_tensor * tensor); // contiguous for dims >= 1
     GGML_API bool ggml_is_contiguous_2(const struct ggml_tensor * tensor); // contiguous for dims >= 2
 
+    GGML_API bool ggml_is_contiguous_to_1(const struct ggml_tensor * tensor); // contiguous for dims < 1
+    GGML_API bool ggml_is_contiguous_to_2(const struct ggml_tensor * tensor); // contiguous for dims < 2
+    GGML_API bool ggml_is_contiguous_to_3(const struct ggml_tensor * tensor); // contiguous for dims < 3
+
     // returns whether the tensor elements are allocated as one contiguous block of memory (no gaps, but permutation ok)
     GGML_API bool ggml_is_contiguously_allocated(const struct ggml_tensor * tensor);