[SDTEST-173] early flake detection support for rspec and minitest

[anmarchenko]

What does this PR do?
Adds a strategy to retry new tests using early flake detection backend. This automatically makes the product work for RSpec and Minitest (but not Cucumber, will be added in subsequent PRs).

Motivation
Early flake detection for Ruby is to be released next

Additional Notes
The TestRetries::Component clearly breaks single responsibility principle: it must be refactored and it will be done in the separate PR.

How to test the change?
Unit tests are provided.

Tested using sidekiq project on staging.

Tests are marked as new by EFD:

They can be found with test.is_retry tag:

Test session has tag early_flake.enabled:

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 97.77778% with 11 lines in your changes missing coverage. Please review.

Project coverage is 98.89%. Comparing base (e2151ad) to head (6c16d02).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
lib/datadog/ci/test_retries/component.rb	83.07%	11 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #229      +/-   ##
==========================================
- Coverage   98.95%   98.89%   -0.06%     
==========================================
  Files         266      268       +2     
  Lines       12754    13171     +417     
  Branches      574      597      +23     
==========================================
+ Hits        12621    13026     +405     
- Misses        133      145      +12     

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