fix: graphql-ruby 2.3 compatibility

[Bajena]

requires merging https://github.com/Gusto/apollo-federation-ruby/issues/276 first

fixes https://github.com/Gusto/apollo-federation-ruby/issues/276

This PR:

• Adds a new appraisal for graphql-ruby 2.3
• Adjusts the Tracer method to support the new way of module-based tracing (https://graphql-ruby.org/queries/tracing)
• Adjusts integration tests to use trace_with method in federated services
• Changes documentation to inform about the new way of tracing
• Adjusts schema generator to work with newer graphql-ruby versions (>2.3.8). It was breaking due to the lack of warden method.

[such]

When can we expect this to be merged?

[risacan]

@sethc2 could you please merge this? 🙏 or delegate to another maintainer? Thanks in advance.

[joeljunstrom]

@Bajena nice! Reasonable to not delete the Gemfile.lock though? Would be very nice to get this in. Can we help?

[la-jamesh]

How are we doing on this PR? This is a major issue for my teams due to #276

[vaclavbohac]

Hello, thx for the feedback. We'll fix the conflicts and put back the Gemfile.lock back in the following week. So we can get this merged upstream.

[whitethunder]

Would love to see this get merged! Thanks for addressing this issue.

[grxy]

:tada: This PR is included in version 3.10.1 :tada:

The release is available on:

• v3.10.1
• GitHub release

Your semantic-release bot :package::rocket:

[sethc2]

I should've released this as 3.11.0 probably. If any strong opinions I can do so.