Set LinearAlgebra test priority to 2 (skip in automation)

SM 6.10 linalg operations are not yet supported in test automation.
Test runners (lit, hcttest.cmd) only run tests with Priority < 2,
so these tests will be skipped until support is available.
See eede016 for prior art on this pattern.

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

Author: alsepkow

tools/clang/unittests/HLSLExec/LinearAlgebra.cpp

@@ -544,7 +544,9 @@ class DxilConf_SM610_LinearAlgebra : public LinAlgTestClassCommon {
   TEST_CLASS_PROPERTY(
       "Kits.Specification",
       "Device.Graphics.D3D12.DXILCore.ShaderModel610.CoreRequirement")
-  TEST_METHOD_PROPERTY(L"Priority", L"0")
+  // Priority 2: SM 6.10 linalg not yet supported in automation. Test runners
+  // (lit, hcttest.cmd) only run tests with Priority < 2. See eede01664.
+  TEST_METHOD_PROPERTY(L"Priority", L"2")
   END_TEST_CLASS()
 
   TEST_CLASS_SETUP(setupClass) { return LinAlgTestClassCommon::setupClass(); }