[SYCL][Matrix] Add initial get_coord API

[arnamoy10]

This patch adds an initial API for the retrieval of coordinates from a work item element. A get_coord() method is added to the intel namespace to work on wi_element class. Also, a relevant SPIRV op is added, which the get_coord() gets lowered to.

This is recreated PR from my forked repo. The discussions are in the original (closed) PR #7037

[dkhaldi]

We recently added support for the unified matrix API. the one you are using now in matrix-jit.hpp is an old API.
The unified API is now in matrix-unified.hpp. But since get_coord is an Intel-specific extension, you should move your development to matrix-intel.hpp.
The examples should also use the new syntax.

[arnamoy10]

We recently added support for the unified matrix API. the one you are using now in matrix-jit.hpp is an old API. The unified API is now in matrix-unified.hpp. But since get_coord is an Intel-specific extension, you should move your development to matrix-intel.hpp. The examples should also use the new syntax.

Done with changes.

[JackAKirk]

LGTM. Just had a few minor comments.

[MrSidims]

(SPIR-V) Headers are LGTM

[arnamoy10]

Test-suite PR: intel/llvm-test-suite#1676

[dkhaldi]

LGTM.
Minor: remove comment on line 195

[arnamoy10]

LGTM. Minor: remove comment on line 195

Done

[arnamoy10]

@intel/llvm-reviewers-runtime Please take a look and merge if it looks good. Thanks

[dm-vodopyanov]

@arnamoy10, please, update description with proper wording, e.g., what this patch introduces/etc

[arnamoy10]

@arnamoy10, please, update description with proper wording, e.g., what this patch introduces/etc

Updated, thank you.

[arnamoy10]

@intel/llvm-gatekeepers , help merge this patch please?

[dm-vodopyanov]

Failed Tests (1):
SYCL :: Basic/kernel_info.cpp

Unrelated to this patch. Issue: #8766