Restrict 1D MatMulInteger tests to CPU EP only

The 1D input tests were running on all EPs including CUDA, which does
not support 1D quantized inputs the same way. Restrict to CPU-only
using the same pattern as other EP-specific tests in this file.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: bmehta001

onnxruntime/test/providers/cpu/math/matmul_integer_test.cc

@@ -514,7 +514,12 @@ TEST(MatmulIntegerOpTest, MatMulInteger_1D_DimensionMismatch) {
   test.AddInput<uint8_t>("a_zero_point", {}, {0});
   test.AddInput<uint8_t>("b_zero_point", {}, {0});
   test.AddOutput<int32_t>("T3", {}, {0});
-  test.Run(OpTester::ExpectResult::kExpectFailure, "MatMul dimension mismatch");
+
+  // Restrict to CPU — other EPs may not support 1D quantized inputs.
+  std::vector<std::unique_ptr<IExecutionProvider>> cpu_only;
+  cpu_only.push_back(DefaultCpuExecutionProvider());
+  test.Run(OpTester::ExpectResult::kExpectFailure, "MatMul dimension mismatch",
+           {}, nullptr, &cpu_only);
 }
 
 // Valid 1D × 1D dot product: both vectors have the same K.
@@ -526,7 +531,11 @@ TEST(MatmulIntegerOpTest, MatMulInteger_1D_Valid) {
   test.AddInput<uint8_t>("a_zero_point", {}, {0});
   test.AddInput<uint8_t>("b_zero_point", {}, {0});
   test.AddOutput<int32_t>("T3", {}, {23});
-  test.Run();
+
+  // Restrict to CPU — other EPs may not support 1D quantized inputs.
+  std::vector<std::unique_ptr<IExecutionProvider>> cpu_only;
+  cpu_only.push_back(DefaultCpuExecutionProvider());
+  test.Run(OpTester::ExpectResult::kExpectSuccess, "", {}, nullptr, &cpu_only);
 }
 
 }  // namespace test