Support QASYMM8 in relu-related operators (#2237)

Support QASYMM8 in relu-related operators (#2237)

* Support QASYMM8 in relu-related operators

ReLU, ReLU1 and ReLU6 supports quantized operation
It adds QuantizationInfo to TensorInfo in operations that supports QASYMM8_TENSOR

Signed-off-by: Jiyoung Yun <jy910.yun@samsung.com>
* Enable quant8 testcases of relu-related operator in GeneratedTests

Enable below GeneratedTests:
GeneratedTests.relu_quant8_1
GeneratedTests.relu_quant8_2
GeneratedTests.relu1_quant8_1
GeneratedTests.relu1_quant8_2
GeneratedTests.relu6_quant8_1
GeneratedTests.relu6_quant8_2

Signed-off-by: Jiyoung Yun <jy910.yun@samsung.com>