Built-in vector types float2, float3 and float4 are not trivially copyable

[dcampora]

float2, float3 and float4 are trivially copyable in CUDA, but they are not in HIP.

This results in the following piece of code working in CUDA, but failing in HIP:

static_assert(std::is_trivially_copyable_v<float2>);

It transitively applies to any class that uses such a data member as well.

[yxsamliu]

This seems due to the assignment operator and similar ones:

https://github.com/ROCm-Developer-Tools/hipamd/blob/rocm-5.1.x/include/hip/amd_detail/amd_hip_vector_types.h#L487

data is builtin vector type for clang and array type for GCC. It seems to me in either case the default assignment operator should work.