[PASS] Add GPU IR verifier (#1296)

include/tvm/ir_pass.h

include/tvm/runtime/device_api.h

python/tvm/_ffi/runtime_ctypes.py

src/api/api_pass.cc

src/pass/verify_gpu_code.cc

src/runtime/cuda/cuda_device_api.cc

src/runtime/metal/metal_device_api.mm

src/runtime/opencl/opencl_device_api.cc

src/runtime/opengl/opengl_device_api.cc

src/runtime/rocm/rocm_device_api.cc

src/runtime/vulkan/vulkan_device_api.cc

tests/python/unittest/test_pass_verify_gpu_code.py