sycl : implementation of reordered Q4_0 MMVQ for Intel GPUs (llama/12858)

sycl : implementation of reordered Q4_0 MMVQ for Intel GPUs (llama/12858)

* sycl : Implemented reorder Q4_0 mmvq

Signed-off-by: Alberto Cabrera <redacted>
* sycl : Fixed mmvq being called when reorder is disabled

* sycl : Improved comments in the quants header

Signed-off-by: Alberto Cabrera <redacted>
* Use static_assert

* safe_div -> ceil_div

* Clarify qi comment

* change the reorder tensor from init to execute OP

* dbg

* Undo changes to test-backend-ops

* Refactor changes on top of q4_0 reorder fix

* Missing Reverts

* Refactored opt_for_reorder logic to simplify code path

* Explicit inlining and unroll

* Renamed mul_mat_algo enum for consistency

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Signed-off-by: Alberto Cabrera <redacted>
Co-authored-by: romain.biessy <redacted>