[SYCL][ESIMD] Fix warning in header (#19519)

We can't use the alias here, we need to use the original type.

Also it fixed some self contained header test for some reason so remove
the XFAIL for that.

---------

Signed-off-by: Sarnie, Nick <[email protected]>

Author: sarnex

sycl/include/sycl/ext/intel/esimd/detail/types_elementary.hpp

@@ -112,7 +112,7 @@ static inline constexpr bool is_clang_vector_type_v =
 
 template <class T> struct vector_element_type;
 
-template <class T, int N> struct vector_element_type<vector_type_t<T, N>> {
+template <class T, int N> struct vector_element_type<raw_vector_type<T, N>> {
   using type = T;
 };
 

sycl/test/self-contained-headers/lit.local.cfg

@@ -7,9 +7,6 @@ config.test_format = SYCLHeadersTest()
 # standalone. `os.path.join` is required here so the filtering works
 # cross-platform
 config.sycl_headers_xfail = [
-    os.path.join(
-        "sycl", "ext", "intel", "esimd", "detail", "types_elementary.hpp"
-    ),
     # FIXME: remove this rule when the header is moved to the clang project
     os.path.join(
         "sycl", "stl_wrappers", "__sycl_cmath_wrapper_impl.hpp"