aarch64: Add support for sme2.1 movaz instructions.

This patch adds support for following sme2.1 movaz instructions and
the spec is available here [1].

1. MOVAZ (array to vector, two registers).
2. MOVAZ (array to vector, four registers).
3. MOVAZ (tile to vector, single).

[1]: https://developer.arm.com/documentation/ddi0602/2024-03/SME-Instructions?lang=en