[vlado]

What does this pull request do?

After #1650 got merged we experienced issue with sneakers spy in our app.

Sneakers gem was abandoned and does not work with Ruby 4. It was replaced by the kicks gem.

Kicks gem still uses sneakers namespace so it will load SneakersSpy which fails because Gem.loaded_specs['sneakers'] returns nil. We fix it by adding fallback to Gem.loaded_specs['kicks'].
Last sneakers version is 2.12.0 and kicks starts from 3.0.0 so this should work properly.

I've added Gemfile switch so we can run specs with kicks gem (SNEAKERS_GEM=kicks bundle install && bundle exec rspec.) on demand.

Checklist

• I have signed the Contributor License Agreement.
• My code follows the style guidelines of this project (See .rubocop.yml)
• I have rebased my changes on top of the latest main branch
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have made corresponding changes to the documentation
• I have updated docs/release-notes/index.md
• I have updated docs/reference/supported-technologies.md
• Added an API method or config option? Document in which version this will be introduced