BevDepth TTNN Model Bringup

[saichandax]

To bring up the BevDepth TTNN model.

Based on the reference onnx model for BevDepth, to support ttnn implementation.

Currently, we have unsupported onnx ops in BevDepth onnx model, hence onnx to torch model conversion is not straightforward.

Next steps:

1. Get the subgraph until the DeformConv (unsupported onnx op).
2. Convert onnx-to-torch for the sub-graph selected.
3. Write sub-module tests and unit tests for the ops in the first sub-graph of BevDepth Model