reshape assert fix (#16300)

### Ticket
Link to Github Issue
#16157

### Problem description
reshape assert for tensor.get_dtype()

### What's changed
replace it with std::nullopt

### Checklist
- [x] Post commit CI passes
https://github.com/tenstorrent/tt-metal/actions/runs/12471397308
- [ ] Blackhole Post commit (if applicable)
- [ ] Model regression CI testing passes (if applicable)
- [ ] Device performance regression CI testing passes (if applicable)
- [ ] **(For models and ops writers)** Full [new
models](https://github.com/tenstorrent/tt-metal/actions/workflows/full-new-models-suite.yaml)
tests passes
- [ ] New/Existing tests provide coverage for changes

ttnn/cpp/ttnn/operations/data_movement/reshape_view/reshape.cpp

@@ -44,7 +44,7 @@ ttnn::Tensor convert_tile_to_rm(
           (tensor.get_dtype() == DataType::BFLOAT8_B)),
         "illegal dimensions for a bfloat8 tensor");
     auto new_tensor = (tensor.get_dtype() == DataType::BFLOAT8_B) ? ttnn::typecast(tensor, DataType::BFLOAT16) : tensor;
-    new_tensor = ttnn::to_layout(tensor, ttnn::ROW_MAJOR_LAYOUT, tensor.get_dtype(), std::nullopt, (Device*)nullptr);
+    new_tensor = ttnn::to_layout(tensor, ttnn::ROW_MAJOR_LAYOUT, std::nullopt, std::nullopt, (Device*)nullptr);
     new_tensor = ReshapeViewOperation::invoke(new_tensor, shape, memory_config, queue_id, pad_value);
     new_tensor =
         ttnn::to_layout(new_tensor, ttnn::TILE_LAYOUT, new_tensor.get_dtype(), memory_config, (Device*)nullptr);