Observed on ARROW-13344, see skipped tests with this JIRA number on them

Reporter: Neal Richardson / @nealrichardson
Assignee: David Li / @lidavidm

Related issues:

• [R] Use Arrow engine for summarize() by default (blocks)
• [C++] ScalarAggregateOptions don't make sense (in hash aggregation) (is blocked by)
• [R] Initial bindings for ExecPlan/ExecNode (relates to)

_{Note: This issue was originally created as ARROW-13497. Please see the migration documentation for further details.}