[QNN EP] exapand convolution test coverage. (#15975)
### Description
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Convolution with Padding and Convolution with large inputs,outputs.
### Motivation and Context
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- If it fixes an open issue, please link to the issue here. -->
This is mainly to check the CPU vs QNN EP output mismatch for models.
./onnxruntime_test_all --gtest_filter=*.TestQDQConvU8U8S32*
Failed tests with mismatch.
[ FAILED ] 2 tests, listed below:
[ FAILED ]
QnnHTPBackendTests.TestQDQConvU8U8S32_large_input1_padding_bias_initializer
[ FAILED ]
QnnHTPBackendTests.TestQDQConvU8U8S32_large_input2_bias_initializer
./onnxruntime_test_all --gtest_filter=*.TestCPUConvf32_*
[ FAILED ]
QnnCPUBackendTests.TestCPUConvf32_large_input1_pad_bias_initializer
