Remove hip-hcc codes: Part three

1.Rename include/hip/hcc_detail/ as include/hip/amd_detail/

2.Rename include/hip/nvcc_detail/ as include/hip/nvidia_detail/

3.Create __HIP_PLATFORM_AMD__ to replace __HIP_PLATFORM_HCC__

4.Create __HIP_PLATFORM_NVIDIA__ to replace __HIP_PLATFORM_NVCC__

After hcc_detail, nvcc_detail, __HIP_PLATFORM_HCC__ and __HIP_PLATFORM_NVCC__
have been removed from upstream, they will be removed from hip runtime.

Change-Id: I1ae457effd739d6c25bca203c1724b026be21fce

hipamd/tests/src/kernel/hipDynamicShared.cpp

@@ -49,7 +49,7 @@ template <typename T>
 __global__ void testExternSharedKernel(const T* A_d, const T* B_d, T* C_d,
                                        size_t numElements, size_t groupElements) {
     // declare dynamic shared memory
-#if defined(__HIP_PLATFORM_HCC__)
+#if defined(__HIP_PLATFORM_AMD__)
     HIP_DYNAMIC_SHARED(T, sdata)
 #else
     HIP_DYNAMIC_SHARED(__align__(sizeof(T)) unsigned char, my_sdata)