ggml: Automatically make tensors contiguous on reshape

GGML requires tensors to be contiguous for reshape and if
this is not the case, it will assert fail. Contiguous is an
expensive operation, so it's best to do it lazily when it is
actually required rather than ahead of time when it may not
be needed.

ml/backend/ggml/ggml.go

@@ -1378,6 +1378,10 @@ func inferShape(t *Tensor, shape []int) {
 }
 
 func (t *Tensor) Reshape(ctx ml.Context, shape ...int) ml.Tensor {
+	if !C.ggml_is_contiguous(t.t) {
+		return t.Contiguous(ctx, shape...)
+	}
+
 	if slices.Contains(shape, -1) {
 		inferShape(t, shape)
 	}