Move check-new-windows-versions.yml workflow from ruby/ruby-builder to ruby/setup-ruby #1770

Job	Run time
Test rubygems: version noops if the default is newer	4s
test-matrix	5s
Test mise.toml	4s
Test bundler: 1.x for old Ruby	21s
Test .ruby-version	5s
Test with no Gemfile	21s
Test rubygems: version uses the Bundler installed by the rubygems update	8s
Test rubygems: version upgrades RubyGems to that version if the default is older	26s
Test with no Gemfile but with bundler-cache	20s
Test with a major Bundler version	20s
Test rubygems: latest on 2.0	8s
Test rubygems: latest on 2.6	26s
Test rubygems: latest on 3.0	8s
Check dist/index.js is up-to-date	12s
Test .tool-versions	6s
Test with a Bundler pre/rc version	23s
Test with rails7 gemfile	10s
Test rubygems: latest on 2.7	27s
Test rubygems: latest on 3.2	12s
Test rubygems: latest on 2.3	23s
Test with rails8 gemfile	12s
Test gemfile depending on Bundler 1	23s
Check windows*versions.json are up-to-date	8s
Test windows-toolchain: none	30s
Test with a minor Bundler version	20s
Test with an exact Bundler version	21s
Test BUNDLED WITH Bundler dev	9s
Test with an older Bundler version than the one of the default gem	9s
Test rubygems: latest on 2.5	23s
${{ matrix.os }} ${{ matrix.ruby }}	0s
	7m 24s

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