Fix `rbenv install --list` exit status

List output: only print stderr notice if printing to a terminal

This makes it easier to redirect `rbenv install -l` output without having to silence stderr to get rid of the extra notice.

Upon installing their first Ruby version on the system, the user may want to set it as their default; otherwise the default will remain "system" and any `gem install` attempts will fail with a permission error.

This suggestion is skipped if the user already has chosen an explicit default, even if it's "system".

Allow OPENSSL_VERSION_TEXT string match without last line for OpenSUSE

macOS: Use GMP from homebrew

MRI's BigInt use GMP under the hood if available, and if not
fallbacks to an homemade implementation with much worse performance.

Without GMP:
```
>> Benchmark.realtime { Integer('1' * (10 ** 7)) }
=> 13.80743500002427
```

With GMP
```
>> Benchmark.realtime { Integer('1' * (10 ** 7)) }
=> 0.4098639999865554
```

macOS not being a common production platform, it's not a huge deal
but it would still preferable to compile with `gmp.h` if present.

I'd also suggest to print a warning if compiling on macOS and gmp
isn't installed, but I don't know if it's desirable.

NB: `--with-gmp-dir` was only added recently, so this will only
apply to MRI >= 3.2, as well as rubies on which this flag was backported.

ci(lint): add shell linter - Differential ShellCheck

It performs differential ShellCheck scans and report results directly in pull request.

documentation: https://github.com/redhat-plumbers-in-action/differential-shellcheck



Signed-off-by: Jan Macku <jamacku@redhat.com>

Signed-off-by: Varun Sharma <varunsh@stepsecurity.io>

bash didn't provide \d

Added 3.2.0-preview2

Fix required rustc version for YJIT in output

Relax rustc version to 1.58.1

suggested by @k0kubun

Co-authored-by: Takashi Kokubun <takashikkbn@gmail.com>

Enable YJIT only x86_64 and arm64

Co-authored-by: Takashi Kokubun <takashikkbn@gmail.com>

Re-enable YJIT with arm64

* Fixes https://github.com/rbenv/ruby-build/issues/1721