#13127: Add physical_shard_shape to ShardSpec attributes

[TT-BrianLiu]

Ticket

Link to Github Issue

Problem description

Need to add physical_shard_shape to ShardSpec attributes. Also, ttnn/cpp/pybind11/pytensor.cpp is horribly formatted, so clang formatting it to make it easier to read.

What's changed

• Update ShardSpec serialization to handle logical and physical sharding
• Add more ShardSpec serialization c++ tests
• Clang-format ttnn/cpp/pybind11/pytensor.cpp

Checklist

• Post commit CI passes: https://github.com/tenstorrent/tt-metal/actions/runs/11917697608
• Blackhole Post commit (if applicable)
• Model regression CI testing passes (if applicable)
• Device performance regression CI testing passes (if applicable)
• New/Existing tests provide coverage for changes