Enable HIP texture functions with HIP vector types

Include texture_functions.h on HIP-Clang path. Use HIP vector types instead of hc::short_vectors for texture_functions, and remove HCC headers.

include/hip/hcc_detail/hip_runtime.h

@@ -110,9 +110,9 @@ extern int HIP_TRACE_API;
 #include <hip/hcc_detail/host_defines.h>
 #include <hip/hcc_detail/device_functions.h>
 #include <hip/hcc_detail/surface_functions.h>
+#include <hip/hcc_detail/texture_functions.h>
 #if __HCC__
 #include <hip/hcc_detail/math_functions.h>
-#include <hip/hcc_detail/texture_functions.h>
 #endif // __HCC__
 
 // TODO-HCC remove old definitions ; ~1602 hcc supports __HCC_ACCELERATOR__ define.