[Feature]: Implement Reformat operator

[zacharyvincze]

Technical Details

• Implements Reformat operator (for NHWC -> NCHW) layout conversions.
• Implements python bindings for the Reformat operator.
• Adds golden implementation for Reformat + C++ and Python tests.
• Minor change to TensorShape::permute(), which adds a size of 1 for dimensions which don't exist in the input layout. This change has been documented in the header's docstrings.

Test Plan

• Ensure C++ Reformat operators (on both CPU and GPU) matches the golden model.

Test Result

• All tests pass.

Submission Checklist

• Look over the contributing guidelines at https://github.com/ROCm/ROCm/blob/develop/CONTRIBUTING.md#pull-requests.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 59.37500% with 39 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/op_reformat.cpp	61.43%	9 Missing and 18 partials ⚠️
include/core/wrappers/image_wrapper.hpp	0.00%	0 Missing and 4 partials ⚠️
include/kernels/host/reformat_host.hpp	69.23%	0 Missing and 4 partials ⚠️
include/op_reformat.hpp	0.00%	2 Missing ⚠️
src/core/tensor_shape.cpp	71.43%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #114      +/-   ##
===========================================
- Coverage    73.88%   73.51%   -0.37%     
===========================================
  Files           74       77       +3     
  Lines         2864     2956      +92     
  Branches       615      640      +25     
===========================================
+ Hits          2116     2173      +57     
- Misses         330      338       +8     
- Partials       418      445      +27     

Files with missing lines	Coverage Δ
include/core/tensor_layout.hpp	91.67% <ø> (+8.33%)	⬆️
include/core/tensor_shape.hpp	100.00% <ø> (+100.00%)	⬆️
include/core/wrappers/generic_tensor_wrapper.hpp	100.00% <ø> (ø)
include/op_reformat.hpp	0.00% <0.00%> (ø)
src/core/tensor_shape.cpp	82.80% <71.43%> (+0.04%)	⬆️
include/core/wrappers/image_wrapper.hpp	69.23% <0.00%> (-2.77%)	⬇️
include/kernels/host/reformat_host.hpp	69.23% <69.23%> (ø)
src/op_reformat.cpp	61.43% <61.43%> (ø)

... and 2 files with indirect coverage changes

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