[Feature]: Can the MLA kernel be open source?

### Suggestion Description

Hi there - could the MLA kernel be open source? That way we can optimize it for our particular shapes.

Specifically looking at: mla_a8w8_qh128_m32x4_n16x2_msk0_ps.so

### Operating System

_No response_

### GPU

_No response_

### ROCm Component

_No response_