Remove nightly-only simd feature and related code in ArrowNumericType

[jhorstmann]

Is your feature request related to a problem or challenge? Please describe what you are trying to do.

With the merge of #5100 all users of the feature-gated methods in ArrowNumericType should be gone and those functions can be removed.

Describe the solution you'd like

• Remove simd related functions from ArrowNumericType trait
• Remove bit_util::bitwise_bin_op_simd which seems to be unused
• Remove simd feature and packed_simd dependency

Describe alternatives you've considered

The ArrowNumericType seems a little bit redundant with ArrowNativeTypeOp, but removing it completely would involve a lot of little api changes, so it's probably better to keep it as an empty marker trait.

Additional context

[tustvold]

label_issue.py automatically added labels {'arrow'} from #5184