Some image array test cases does not work properly for embedded profile.

https://github.com/KhronosGroup/OpenCL-CTS/blob/6a64c5a0c74b9e4a83025628f2cdb746647cdfb1/test_conformance/api/test_mem_object_info.cpp#L532
https://github.com/KhronosGroup/OpenCL-CTS/blob/6a64c5a0c74b9e4a83025628f2cdb746647cdfb1/test_conformance/images/samplerlessReads/test_read_1D_array.cpp#L253
https://github.com/KhronosGroup/OpenCL-CTS/blob/6a64c5a0c74b9e4a83025628f2cdb746647cdfb1/test_conformance/images/samplerlessReads/test_read_2D_array.cpp#L245

According to the OpenCL Specification 1.2, the minimum value of CL_DEVICE_IMAGE_MAX_ARRAY_SIZE can be 256 for Ebedded Profile.
The code above cannot work properly when the Max Array Size is 256.

Start with the referenced code in test_conformance/api/test_mem_object_info.cpp and the samplerless image tests test_read_1D_array.cpp and test_read_2D_array.cpp. Compare the array-size assumptions at the cited lines with the OpenCL 1.2 embedded-profile minimum of 256. Done means the affected cases work correctly when CL_DEVICE_IMAGE_MAX_ARRAY_SIZE is 256.

Written by the indexing model from the issue text.