insns.dat: Enable contracted forms for additional instructions

Improve consistency by allowing contracted forms for EVEX-encoded
instructions when it's allowed for similar VEX-encoded instructions.

Previously the behavior would change depending on the vector size or
the register number which could be somewhat confusing:

    vaddps xmm0, xmm1  ; ok
    vaddps ymm0, ymm1  ; ok
    vaddps zmm0, zmm1  ; error
    vaddps xmm0, xmm16 ; error

Also allow contracted forms for a few additional older AVX instructions
where it makes sense.

Signed-off-by: Henrik Gramner <[email protected]>
Signed-off-by: Cyrill Gorcunov <[email protected]>