[SYCL][DOC] Enable SYCL_EXT_ONEAPI_PROPERTIES extension

These changes adds the definition of the SYCL_EXT_ONEAPI_PROPERTIES
feature macro and moves the corresponding proposal to experimental
support.

Signed-off-by: Steffen Larsen <[email protected]>

Author: steffenlarsen

sycl/doc/extensions/proposed/sycl_ext_oneapi_properties.asciidoc renamed to sycl/doc/extensions/experimental/sycl_ext_oneapi_properties.asciidoc

@@ -53,6 +53,7 @@ namespace sycl {
 #define SYCL_EXT_ONEAPI_USE_PINNED_HOST_MEMORY_PROPERTY 1
 #define SYCL_EXT_ONEAPI_SRGB 1
 #define SYCL_EXT_ONEAPI_SUB_GROUP 1
+#define SYCL_EXT_ONEAPI_PROPERTIES 1
 #define SYCL_EXT_INTEL_BF16_CONVERSION 1
 #define SYCL_EXT_INTEL_DATAFLOW_PIPES 1
 #ifdef __clang__