[QNN] Renaming tests to follow the Relay nomenclature. (#3975)

diff --git a/tests/python/relay/test_qnn_add.py b/tests/python/relay/test_op_qnn_add.py
similarity index 100%
rename from tests/python/relay/test_qnn_add.py
rename to tests/python/relay/test_op_qnn_add.py

diff --git a/tests/python/relay/test_qnn_concatenate.py b/tests/python/relay/test_op_qnn_concatenate.py
similarity index 100%
rename from tests/python/relay/test_qnn_concatenate.py
rename to tests/python/relay/test_op_qnn_concatenate.py

diff --git a/tests/python/relay/test_qnn_conv2d.py b/tests/python/relay/test_op_qnn_conv2d.py
similarity index 100%
rename from tests/python/relay/test_qnn_conv2d.py
rename to tests/python/relay/test_op_qnn_conv2d.py

diff --git a/tests/python/relay/test_qnn_dequantize.py b/tests/python/relay/test_op_qnn_dequantize.py
similarity index 100%
rename from tests/python/relay/test_qnn_dequantize.py
rename to tests/python/relay/test_op_qnn_dequantize.py

diff --git a/tests/python/relay/test_qnn_quantize.py b/tests/python/relay/test_op_qnn_quantize.py
similarity index 100%
rename from tests/python/relay/test_qnn_quantize.py
rename to tests/python/relay/test_op_qnn_quantize.py

diff --git a/tests/python/relay/test_qnn_requantize.py b/tests/python/relay/test_op_qnn_requantize.py
similarity index 100%
rename from tests/python/relay/test_qnn_requantize.py
rename to tests/python/relay/test_op_qnn_requantize.py