[CIVIS-9333] support custom configuration tags supplied from the environment

[anmarchenko]

What does this PR do?
There are some configurations that cannot be directly identified and reported automatically. For those cases, the user must provide the configuration details to the library so CI Visibility can properly identify them. These tags affect the test fingerprint. These custom configurations are passed via DD_TAGS with a test.configuration. prefix, that is, every test.configuration.* tag will be treated as a custom configuration.

We send these custom configurations when requesting library settings and skippable tests in data.attributes.configurations.custom field.

How to test the change?
Using anmarchenko/sidekiq

Test with custom configurations:

Logs when sending skippable request:

D, [2024-04-24T14:02:38.210618 #19229] DEBUG -- datadog: [datadog] (/Users/andrey.marchenko/p/datadog-ci-rb/lib/datadog/ci/itr/skippable.rb:71:in `fetch_skippable_tests') Fetching skippable tests with request: {"data":{"type":"test_params","attributes":{"test_level":"test","service":"sidekiq","env":"ci","repository_url":"git@github.com:anmarchenko/sidekiq.git","sha":"345a0d3c42d02b86fb2b9e590d70e6fe67da95a4","configurations":{"os.platform":"darwin23","os.architecture":"arm64","os.version":"23.4.0","runtime.name":"ruby","runtime.version":"3.3.0","custom":{"disk":"slow","memory":"low"}}}}}

Logs when sending settings request:

D, [2024-04-24T14:02:36.620087 #19229] DEBUG -- datadog: [datadog] (/Users/andrey.marchenko/p/datadog-ci-rb/lib/datadog/ci/transport/remote_settings_api.rb:65:in `fetch_library_settings') Fetching library settings with request: {"data":{"id":"d0bf8c94-c9c2-45e0-a317-088d1ca75b7f","type":"ci_app_test_service_libraries_settings","attributes":{"service":"sidekiq","env":"ci","repository_url":"git@github.com:anmarchenko/sidekiq.git","branch":"itr_test1","sha":"345a0d3c42d02b86fb2b9e590d70e6fe67da95a4","test_level":"test","configurations":{"os.platform":"darwin23","os.architecture":"arm64","os.version":"23.4.0","runtime.name":"ruby","runtime.version":"3.3.0","custom":{"disk":"slow","memory":"low"}}}}}

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.06%. Comparing base (f0592d1) to head (a1f0eb7).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #166   +/-   ##
=======================================
  Coverage   99.06%   99.06%           
=======================================
  Files         196      196           
  Lines        9377     9419   +42     
  Branches      407      409    +2     
=======================================
+ Hits         9289     9331   +42     
  Misses         88       88           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.