[R] Add bindings for compare and boolean kernels

[asfimport]

See cpp/src/arrow/compute/kernels/compare.h and boolean.h. ARROW-6980 introduces an Expression class that works on Arrow Arrays, but to evaluate the expressions, it has to pull the data into R first. This would enable us to do the work in C++ and only pull in the result.

Reporter: Neal Richardson / @nealrichardson
Assignee: Neal Richardson / @nealrichardson

Related issues:

• [C++] C++ array kernels framework and execution buildout (umbrella issue) (is a child of)
• [R] Provide binding for arrow::compute::CallFunction (is related to)

PRs and other links:

• GitHub Pull Request #7668

_{Note: This issue was originally created as ARROW-6982. Please see the migration documentation for further details.}

[asfimport]

Wes McKinney / @wesm:
Like ARROW-6978, wrapping CallFunction would allow dynamic invocation of any kernel from R

[asfimport]

Neal Richardson / @nealrichardson:
Issue resolved by pull request 7668
#7668