[CI] test.yml - use bundle exec, use setup-ruby bundler-cache, fixes Windows issue

[MSP-Greg]

I saw this comment, which referred to failing tests on Windows for Ruby 3.0 thru 3.2.

I'm not exactly sure what the issue is, as it involves setup-ruby updating Bundler without updating RubyGems, which is done to some Windows Rubies due to a lack of a bash bin/bundle file.

Also, at present, two items:

1. CI is using Bundler with a Gemfile, but it's not using bundle exec. This works, as Bundler defaults to installing gems such that one doesn't need bundle exec.

2. Because of the above, every CI job is downloading and installing the gems, although setup-ruby can cache them.

This PR removes the bundle install step, and uses setup-ruby's bundler-cache option. It also runs steps with bundle exec.

All jobs passed in my fork...

[MSP-Greg]

This PR just removes the Actions 'depends/bundle install' step from the 'test' group. I left it in the 'test-openssls' group.

All the jobs in 'test-openssls' group use the same OS and Ruby version/platform (Ubuntu 22.04 & Ruby 3.0), so I believe all the jobs would have the same 'cache key' used for the gem cache. I suspect if the cache is a 'full match', so all jobs are only reading it, things would be fine.

But, if the cache needed to be updated, and multiple concurrent jobs try to update it, interesting things might happen. Since all of its jobs are passing, I left as is.

[MSP-Greg]

See #759, which also fixes this problem

[rhenium]

Thank you for digging into it. Looking at ruby/rubygems#7638, it's likely an issue in Bundler. [It's strange I can't reproduce it on my locally installed Ruby 3.2 (RubyGems 3.4.19) and Bundler 2.5.10, by the way. Bundler::SharedHelpers is correctly autoloaded for me.]

1. CI is using Bundler with a Gemfile, but it's not using bundle exec. This works, as Bundler defaults to installing gems such that one doesn't need bundle exec.

2. Because of the above, every CI job is downloading and installing the gems, although setup-ruby can cache them.

Regardless, these changes make perfect sense. Thank you!

[MSP-Greg]

it's likely an issue in Bundler

Agreed. Since RubyGems and Bundler are 'separate' gems, this issue seems to only exist with certain combinations of the two.

And, since there's no guarantee of what combination a user may have installed...