Fix Installation Build for Ruby 3.4

[arielvalentin]

The latest version of Ruby 3.4 requires mutex_m to be explicitly installed as a gem.

/opt/hostedtoolcache/Ruby/3.4.1/x64/lib/ruby/gems/3.4.0/gems/httpclient-2.8.3/lib/httpclient/auth.rb:11: warning: mutex_m was loaded from the standard library, but is not part of the default gems starting from Ruby 3.4.0.
You can add mutex_m to your Gemfile or gemspec to silence this warning.
/opt/hostedtoolcache/Ruby/3.4.1/x64/lib/ruby/3.4.0/bundled_gems.rb:82:in 'Kernel.require': cannot load such file -- mutex_m (LoadError)
   from /opt/hostedtoolcache/Ruby/3.4.1/x64/lib/ruby/3.4.0/bundled_gems.rb:82:in 'block (2 levels) in Kernel#replace_require'
   from /opt/hostedtoolcache/Ruby/3.4.1/x64/lib/ruby/gems/3.4.0/gems/zeitwerk-2.7.1/lib/zeitwerk/core_ext/kernel.rb:34:in 'Kernel#require'
   from /opt/hostedtoolcache/Ruby/3.4.1/x64/lib/ruby/gems/3.4.0/gems/httpclient-2.8.3/lib/httpclient/auth.rb:11:in '<top (required)>'
   from /opt/hostedtoolcache/Ruby/3.4.1/x64/lib/ruby/3.4.0/bundled_gems.rb:82:in 'Kernel.require'
   from /opt/hostedtoolcache/Ruby/3.4.1/x64/lib/ruby/3.4.0/bundled_gems.rb:82:in 'block (2 levels) in Kernel#replace_require'
   from /opt/hostedtoolcache/Ruby/3.4.1/x64/lib/ruby/gems/3.4.0/gems/zeitwerk-2.7.1/lib/zeitwerk/core_ext/kernel.rb:34:in 'Kernel#require'
   from /opt/hostedtoolcache/Ruby/3.4.1/x64/lib/ruby/gems/3.4.0/gems/httpclient-2.8.3/lib/httpclient.rb:19:in '<top (required)>'
   from <internal:/opt/hostedtoolcache/Ruby/3.4.1/x64/lib/ruby/3.4.0/rubygems/core_ext/kernel_require.rb>:37:in 'Kernel#require'
   from <internal:/opt/hostedtoolcache/Ruby/3.4.1/x64/lib/ruby/3.4.0/rubygems/core_ext/kernel_require.rb>:37:in 'Kernel#require'
   from /opt/hostedtoolcache/Ruby/3.4.1/x64/lib/ruby/3.4.0/bundled_gems.rb:82:in 'block (2 levels) in Kernel.replace_require'
   from /opt/hostedtoolcache/Ruby/3.4.1/x64/lib/ruby/gems/3.4.0/gems/zeitwerk-2.7.1/lib/zeitwerk/core_ext/kernel.rb:34:in 'Kernel.require'
   from /opt/hostedtoolcache/Ruby/3.4.1/x64/lib/ruby/3.4.0/bundler/runtime.rb:65:in 'block (2 levels) in Bundler::Runtime#require'
   from /opt/hostedtoolcache/Ruby/3.4.1/x64/lib/ruby/3.4.0/bundler/runtime.rb:60:in 'Array#each'
   from /opt/hostedtoolcache/Ruby/3.4.1/x64/lib/ruby/3.4.0/bundler/runtime.rb:60:in 'block in Bundler::Runtime#require'
   from /opt/hostedtoolcache/Ruby/3.4.1/x64/lib/ruby/3.4.0/bundler/runtime.rb:52:in 'Array#each'
   from /opt/hostedtoolcache/Ruby/3.4.1/x64/lib/ruby/3.4.0/bundler/runtime.rb:52:in 'Bundler::Runtime#require'
   from /opt/hostedtoolcache/Ruby/3.4.1/x64/lib/ruby/3.4.0/bundler.rb:216:in 'Bundler.require'
   from /home/runner/work/opentelemetry-ruby-contrib/opentelemetry-ruby-contrib/releases/test/test_helper.rb:8:in '<top (required)>'
   from /opt/hostedtoolcache/Ruby/3.4.1/x64/lib/ruby/3.4.0/bundled_gems.rb:82:in 'Kernel.require'
   from /opt/hostedtoolcache/Ruby/3.4.1/x64/lib/ruby/3.4.0/bundled_gems.rb:82:in 'block (2 levels) in Kernel#replace_require'
   from /home/runner/work/opentelemetry-ruby-contrib/opentelemetry-ruby-contrib/releases/test/integration/installation_test.rb:7:in '<top (required)>'
   from /opt/hostedtoolcache/Ruby/3.4.1/x64/lib/ruby/3.4.0/bundled_gems.rb:82:in 'Kernel.require'
   from /opt/hostedtoolcache/Ruby/3.4.1/x64/lib/ruby/3.4.0/bundled_gems.rb:82:in 'block (2 levels) in Kernel#replace_require'
   from -e:1:in '<main>'

https://github.com/open-telemetry/opentelemetry-ruby-contrib/actions/runs/12672136281/job/35315485307

[arielvalentin]

I learned that mutex_m is a dependency of some transitive gems. I think we should upgrade them to the latest version compatible with Ruby 3.4.

E.g. the latest version of minitest no longer uses mutex_m and we should remove it whereever possible.