target/arm: Add alignment argument to gen_sve_{ldr, str}

target/arm: Add alignment argument to gen_sve_{ldr, str}

Honor AlignmentEnforced() for LDR/STR (vector),
(predicate), and (array vector).

Within the expansion functions, clear @align when we're
done emitting loads at the largest size.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20250704142112.1018902-19-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>