[SM6.10][HLK] Add LinAlg execution test infrastructure with Load/Store/Splat tests (#8285)

Introduce `LinAlgTests.cpp` with a new pattern for execution tests where
ShaderOp objects are built programmatically in C++ no ShaderOpArith.xml
entries required. Shader source, resources, and root signatures are all
defined in the `.cpp` file.

Tests will currently be skipped since no driver reports SM6.10 support

Co-authored-by: Copilot <[email protected]>

---------

Co-authored-by: Damyan Pepper <[email protected]>
Co-authored-by: Copilot <[email protected]>
Co-authored-by: Alex Sepkowski <[email protected]>

Author: 4 people

tools/clang/unittests/HLSLExec/CMakeLists.txt

@@ -10,6 +10,7 @@ add_clang_library(ExecHLSLTests SHARED
   ShaderOpTest.cpp
   TableParameterHandler.cpp
   LongVectors.cpp
+  LinAlgTests.cpp
   HlslExecTestUtils.cpp
   ExecHLSLTests.rc
   )