Fix missing include for CudaHasBF16Support in conv_fp16_test.cc

[Copilot]

Description

Adds missing #include "test/common/cuda_op_test_utils.h" to conv_fp16_test.cc.

The ConvBF16Test_Conv2D_1 test calls CudaHasBF16Support() but the header defining it was not included.

Motivation and Context

Fixes Linux CPU packaging pipeline build failure:

/onnxruntime_src/onnxruntime/test/providers/cpu/nn/conv_fp16_test.cc:281:8: error: 'CudaHasBF16Support' was not declared in this scope
  281 |   if (!CudaHasBF16Support()) {
      |        ^~~~~~~~~~~~~~~~~~

Other test files using this function (pool_fp16_op_test.cc, element_wise_ops_test.cc, skiplayernorm_op_test.cc) already include this header.

Original prompt

Linux CPU packaging pipeline failed with this error:

/onnxruntime_src/onnxruntime/test/providers/cpu/nn/conv_fp16_test.cc: In member function ‘virtual void onnxruntime::test::ConvBF16Test_Conv2D_1_Test::TestBody()’:
/onnxruntime_src/onnxruntime/test/providers/cpu/nn/conv_fp16_test.cc:281:8: error: ‘CudaHasBF16Support’ was not declared in this scope
  281 |   if (!CudaHasBF16Support()) {
      |        ^~~~~~~~~~~~~~~~~~

it looks like CudaHasBF16Support is declared inside a macro section which is inconsistent.

Please try to figure out the reason and perform a fix and make a PR for it

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[fs-eire]

/azp run Linux QNN CI Pipeline, Win_TRT_Minimal_CUDA_Test_CI, Windows ARM64 QNN CI Pipeline, Windows GPU Doc Gen CI Pipeline

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