[C++] Support half-float tensors in equality comparison

[HyukjinKwon]

Describe the enhancement requested

arrow/cpp/src/arrow/compare.cc

Line 1312 in 15b7494

// TODO: Support half-float tensors

72d20ad already fixed this

Component(s)

C++

[HyukjinKwon]

I am taking a look at this.