Use images from images-rb

[TonyCTHsu]

What does this PR do?

Use images from images-rb

[anmarchenko]

@TonyCTHsu thank you!!

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.87%. Comparing base (ef4a668) to head (55beaae).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #198      +/-   ##
==========================================
- Coverage   98.88%   98.87%   -0.01%     
==========================================
  Files         231      231              
  Lines       10368    10368              
  Branches      475      475              
==========================================
- Hits        10252    10251       -1     
- Misses        116      117       +1     

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[ivoanjo]

Should we maybe delete the Dockerfiles in https://github.com/DataDog/dd-trace-rb/tree/master/.circleci/images/primary to avoid any confusion?

[TonyCTHsu]

Should we maybe delete the Dockerfiles in https://github.com/DataDog/dd-trace-rb/tree/master/.circleci/images/primary to avoid any confusion?

For migration, we can swap out all the images used for unit tests theoretically. But those images are used by integration tests in dd-trace-rb. We need to change how we conduct integration tests before deleting those images.

[ivoanjo]

But those images are used by integration tests in dd-trace-rb.

Wait, isn't the integration test images (in CircleCI) what we're changing here? Or do you maybe mean the images we use in docker-compose.yml for local development?

[ivoanjo]

Update: I totally thought this PR was on the dd-trace-rb repo. My comments make no sense in the scope of datadog-ci-rb. Sorry for the confusion >_>