[New Operator] Average Blur operator

[paveltc]

Motivation

This adds the the C++ and Python implementations of the Average Blur operator.

Technical Details

The Average Blur operator is a convolution operator that takes the average over a group of pixels and writes the average to the target pixel (typically the center pixel in the middle of the convolution).
The GPU implementation has two different implementations.

• The first implementation is a simple 2D convolution, which works better for smaller kernels such as 3x3, 5x5 and 7x7.
• The second implementation does a horizontal and a vertical pass and uses tiling and shared memory to optimize the operation. This works better for larger kernels like 9x9 and 11x11.

Test Plan

• A C-Model is included with this PR along with a number of tests to check different configurations.
• A Python test is also included with different combinations of inputs.

Test Result

All C++ and Python 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 70.37037% with 56 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/op_avg_blur.cpp	69.46%	27 Missing and 24 partials ⚠️
include/kernels/host/avg_blur_host.hpp	77.27%	0 Missing and 5 partials ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #145      +/-   ##
===========================================
- Coverage    74.40%   74.10%   -0.30%     
===========================================
  Files           79       81       +2     
  Lines         3355     3544     +189     
  Branches       738      770      +32     
===========================================
+ Hits          2496     2626     +130     
- Misses         378      407      +29     
- Partials       481      511      +30     

Files with missing lines	Coverage Δ
include/kernels/host/avg_blur_host.hpp	77.27% <77.27%> (ø)
src/op_avg_blur.cpp	69.46% <69.46%> (ø)

... and 1 file with indirect coverage changes

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.