[SYCL][DOC] Add extension for annotated_ptr class and its properties (#5755)

Introduce three new extensions:
1. `sycl_ext_oneapi_annotated_ptr` 
Introduces a pointer wrapper class that provides a mechanism to attach
compile-time constant information to a pointer in a manner that allows
the compiler to reliably maintain and analyze the information.

2. `sycl_ext_intel_fpga_kernel_arg_properties`
Defines additional supported properties for `annotated_ptr` and
`annotated_arg` classes. This commit will remove the extension
`sycl_ext_intel_fpga_annotated_arg_properties`.

3. `sycl_ext_oneapi_kernel_arg_restrict_property`
Defines the `restrict` property for `annotated_ptr` and `annotated_arg`
classes in a separate extension rather than including it in
`sycl_ext_intel_fpga_kernel_arg_properties` so that vendors can support
the property without having to support FPGA specific properties.

This commit also updates the annotated_arg extension to remove function
overloads that are not needed.

Co-authored-by: Chen, Brox <[email protected]>
Co-authored-by: Brox Chen <[email protected]>

Author: 3 people