arrow

ARROW-13776: [C++] Offline thirdparty versions.txt is missing extensions for some files

Changes:
- Add extension to AWS files in [`versions.txt`](https://github.com/apache/arrow/blob/master/cpp/thirdparty/versions.txt)
- Make thrift download https, rather than http, in [`ThirdpartyToolchain.cmake`](https://github.com/apache/arrow/blob/master/cpp/cmake_modules/ThirdpartyToolchain.cmake)

The first of these is needed for to enable S3 support in the offline R package build (ARROW-12981). The second just seems like a good idea.

Closes #11015 from karldw/fix-13776

Authored-by: karldw <karldw@users.noreply.github.com>
Signed-off-by: Sutou Kouhei <kou@clear-code.com>