CK: Extract shared boilerplate from 47 gemm_quant test files
(#6323)
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Depends on #6303
## Summary
Extract shared test boilerplate (includes, type aliases, test fixture
macros) from 47 `test_gemm_quant_*` files into a single
`test_gemm_quant_common.hpp` header. Each test file is reduced from ~50
lines of boilerplate to ~5 lines.
| Metric | Value |
|--------|-------|
| Files changed | 48 |
| Insertions | +413 |
| Deletions | −1,106 |
| **Net lines removed** | **−693** |
### What changed
| Before | After |
|--------|-------|
| 47 test files, each with ~50 lines of identical includes, type
aliases, and fixture macros | 1 shared header
(`test_gemm_quant_common.hpp`) + 47 thin files (~5 lines each: include +
params) |
### Readability assessment
A code realist review confirmed this change **improves readability**:
the 47 test files had identical boilerplate obscuring the only
meaningful content — the `GemmConfig` type alias and test dimensions.
After the refactoring, each file's unique configuration is immediately
visible, and adding a new test variant requires specifying only the
varying parameters instead of copying 50 lines.
### Cumulative cleanup series stats
| PR | Description | Net lines |
|----|-------------|-----------|
| #6300 | Remove 61 dead `#if 0` blocks | −2,648 |
| #6302 | Remove 41 commented-out dead code blocks | −2,861 |
| #6303 | Remove 4 orphaned files | −3,886 |
| This PR | Extract gemm_quant test boilerplate | −693 |
| **Total** | | **−10,088** |
* Add support for mixed precision in contraction scale and bilinear (#936)
* Extract common functionality to separate files
* Reference contraction: Remove incorrect consts from type_converts
* Reference contraction: Add missing type_convert for dst value
* Reference contraction: Fix incorrect order of B matrix dimensions
* Add support for mixed precision in contraction scale and bilinear
* Move using statements from instances to a common file
* Move using statements from examples to a common file
* Fix the order of B matrix dimensions across examples and profiler
* Fix the computation of error threshold
* Make ComputeDataType an optional argument
* Include possible DataType -> ComputeDataType casting error in the threshold
* Remove commented code
* Make the ComputeDataType an optional argument in instance
---------
Co-authored-by: Illia Silin <98187287+illsilin@users.noreply.github.com>
* Extract common functionality to separate files
* Reference contraction: Remove incorrect consts from type_converts
* Reference contraction: Add missing type_convert for dst value
* Reference contraction: Fix incorrect order of B matrix dimensions
* Add support for mixed precision in contraction scale and bilinear
* Move using statements from instances to a common file
* Move using statements from examples to a common file
* Fix the order of B matrix dimensions across examples and profiler
* Fix the computation of error threshold
* Make ComputeDataType an optional argument
* Include possible DataType -> ComputeDataType casting error in the threshold
* Remove commented code
* Add contraction profiler and tests
* Build and style fixes
* Allow to use any elementwise operator for ref_contraction
* Introduce profile_contraction_scale and profile_contraction_bilinear
* Make ref_contraction generic and extend interface tests
* Stylistic minor fixes
* Extend test_contraction_interface
