[AMDGPU][True16][MC] true16 for v_cmp_xx_i/u16 (#122968)
A bulk commit of true16 support for v_cmp_xx_i/u16 instructions
including:
v_cmp_lt_i16
v_cmp_eq_i16
v_cmp_le_i16
v_cmp_gt_i16
v_cmp_ne_i16
v_cmp_ge_i16
v_cmp_lt_u16
v_cmp_eq_u16
v_cmp_le_u16
v_cmp_gt_u16
v_cmp_ne_u16
v_cmp_ge_u16
