[R] impliment dplyr::reframe

### Describe the enhancement requested

After dplyr 1.1.0, the use of `summarise` for returning multi-line results for each groups is deprecated and using `reframe` is recommended instead.
https://dplyr.tidyverse.org/reference/reframe.html

(Because reframe has the `.by` argument, #35667 must be merged first.)

### Component(s)

R

Start by reading the linked dplyr reframe reference and the existing summarise behavior in the R component. Check issue #35667 first because the body says reframe's .by argument depends on it. Done means the R interface supports reframe as the recommended replacement for multi-line grouped results.

Written by the indexing model from the issue text.