sycl : Add DMMV ESIMD Q3_K kernel (llama/26251)

sycl : Add DMMV ESIMD Q3_K kernel (llama/26251)

* Add DMMV Q4_K and Q6_K ESIMD kernels

Configure cmake build with -DGGML_SYCL_ESIMD=ON to enable.

Signed-off-by: Todd Malsbary <redacted>
* Refactor ESIMD kernels to share common code

Signed-off-by: Todd Malsbary <redacted>
* Move control of ESIMD from compile to runtime

Signed-off-by: Todd Malsbary <redacted>
* Use ESIMD by default when available

Signed-off-by: Todd Malsbary <redacted>
* Fix possible error when using ESIMD by default

While not an issue in the current version, this will become an
issue when additional QK ESIMD kernels are added (such as Q2_K).

Signed-off-by: Todd Malsbary <redacted>
* Add explicit unroll to ESIMD kernels

Signed-off-by: Todd Malsbary <redacted>
* Tidy up ESIMD kernels a bit

Signed-off-by: Todd Malsbary <redacted>
* Add DMMV Q3_K ESIMD kernel

Signed-off-by: Todd Malsbary <redacted>
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Signed-off-by: Todd Malsbary <redacted>