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ARROW-6982: [R] Add bindings for compare and boolean kernels

The scope of this has grown to something larger than the description. In addition to adding bindings to boolean kernels, it also changes how the dplyr filter expressions are generated and evaluated for RecordBatch and Table. Previously, any R function could be used to `filter()` because evaluation happened in R by calling `as.vector` on any Arrays referenced. Now, `filter()` translates R function names to Arrow function names, and evaluation passes the function and arguments to `call_function`. The benefit is that filtering a RecordBatch/Table happens all in Arrow, no pulling data into R and then sending back to Arrow to filter it. The cost is that only functions supported in Arrow can be used now.

In addition to these improvements, the patch includes some extra validation, testing, and print method upgrades.

There are a number of less-than-ideal design choices in here. Some are related to https://issues.apache.org/jira/browse/ARROW-9001 because we have to track/make a guess as to whether the result of `call_function` should be an Array, ChunkedArray, etc.

There's also a bit of duplication here between the two Arrow expression classes, this R-specific parse tree of array/compute expressions and the other Dataset filter expressions. I think that's unavoidable at this time but we should and I expect we will rationalize this in the near future.

Closes #7668 from nealrichardson/r-kernels

Authored-by: Neal Richardson <neal.p.richardson@gmail.com>
Signed-off-by: Neal Richardson <neal.p.richardson@gmail.com>