[R] drop support for R 3.3

[asfimport]

Glue no longer supports R 3.3 [1]. We only use glue ourselves in codegen, but vctrs imports glue, so we transitively depend on it.

Our r versions nightly build is failing 3.3 because of this:
https://github.com/ursacomputing/crossbow/runs/4688293849?check_suite_focus=true

#14 28.34 Installing 1 packages: glue
#14 40.04 Error: Failed to install 'glue' from CRAN:
#14 40.04   (converted from warning) package ‘glue’ is not available (for R version 3.3.3)
#14 40.04 Execution halted
#14 ERROR: executor failed running [/bin/sh -c /arrow/ci/scripts/r_deps.sh /arrow]: exit code: 1
------
 > importing cache manifest from apache/arrow-dev:r-rstudio-r-base-3.3-bionic:
------
------
 > [10/10] RUN /arrow/ci/scripts/r_deps.sh /arrow:
------
executor failed running [/bin/sh -c /arrow/ci/scripts/r_deps.sh /arrow]: exit code: 1
Service 'r' failed to build : Build failed
Error: `docker-compose --file /home/runner/work/crossbow/crossbow/arrow/docker-compose.yml build --build-arg BUILDKIT_INLINE_CACHE=1 r` exited with a non-zero exit code 1, see the process log above.

[1] https://cran.r-project.org/web/packages/glue/index.html

Reporter: Jonathan Keane / @jonkeane
Assignee: Jonathan Keane / @jonkeane

PRs and other links:

• GitHub Pull Request #12072

_{Note: This issue was originally created as ARROW-15235. Please see the migration documentation for further details.}

[asfimport]

Jonathan Keane / @jonkeane:
Issue resolved by pull request 12072
#12072