[R] Bindings for utf8_reverse and ascii_reverse

[asfimport]

Reporter: Nicola Crane / @thisisnic
Assignee: Nicola Crane / @thisisnic

Related issues:

• [C++] String reverse kernel (depends upon)

PRs and other links:

• GitHub Pull Request #10589

_{Note: This issue was originally created as ARROW-12869. Please see the migration documentation for further details.}

[asfimport]

Ian Cook / @ianmcook:
Issue resolved by pull request 10589
#10589

[asfimport]

Neal Richardson / @nealrichardson:
See #10706, this appears not to be implemented successfully yet.

[asfimport]

Nicola Crane / @thisisnic:
Closing this ticket it favour of ARROW-13324 as submitting a second PR for the same ticket mangles the code review on GitHub.