Remove -no-opaque-pointers flags from fixed tests.

[bader]

No description provided.

[bader]

Tagging @jcranmer-intel.

[bader]

FYI: Below is the list of OpenCL C tests still using -no-opaque-pointers option.

test/event_no_group_cap.cl
test/image-unoptimized.cl
test/read_image.cl
test/transcoding/AtomicCompareExchangeExplicit_cl20.cl
test/transcoding/GenericCastToPtr.cl
test/transcoding/OpImageSampleExplicitLod_arg.cl
test/transcoding/OpImageWrite.cl
test/transcoding/OpenCL/atomic_cmpxchg.cl
test/transcoding/OpenCL/atomic_legacy.cl
test/transcoding/SPV_INTEL_device_side_avc_motion_esimation/subgroup_avc_intel_generic.cl
test/transcoding/SPV_INTEL_device_side_avc_motion_esimation/subgroup_avc_intel_vme_image.cl
test/transcoding/SPV_INTEL_inline_assembly/inline_asm_clobbers.cl
test/transcoding/SPV_INTEL_media_block_io.cl
test/transcoding/SampledImage.cl
test/transcoding/atomic_explicit_arguments.cl
test/transcoding/atomic_flag.cl
test/transcoding/block_w_struct_return.cl
test/transcoding/clk_event_t.cl
test/transcoding/enqueue_kernel.cl
test/transcoding/enqueue_marker.cl
test/transcoding/global_block.cl
test/transcoding/pipe_builtins.cl