[CIVIS-8552] ci-queue runner support for minitest

[anmarchenko]

What does this PR do?
Adds ci-queue support when using Minitest

Additional Notes
ci-queue is a test runner developed and open sourced by Shopify.
It runs Minitest and RSpec (deprecated) test suites in parallel using several workers and coordinating using redis queue.

ci-queue instrumentation for Minitest posed several challenges:

• it turned out that datadog-ci-rb currently abuses Minitest plugin system by accessing Minitest.extensions directly which caused ci-queue to fail completely
• even when using the correct way of working with minitest plugins by putting the plugin code in minitest/datadog_ci_plugin.rb file it still fails: ci-queue uses minitest-reporters gem that does not correctly work with minitest plugin system. Minitest-reporters gem simply replaces the framework reporters with its own reporters essentially discarding them. Author of minitest framework created an issue in minitest-reporters repository about this problem but it isn't resolved to this day
• above issues were solved by directly instrumenting Minitest::CompositeReporter class that is not being overwritten by minitest-reporters (yet?)
• ci-queue does not include Minitest::Parallel::Test in Minitest::Test so we missed test suites - solved by checking if Minitest::Queue is included

How to test the change?
Unit tests are provided

[codecov-commenter]

Codecov Report

Attention: 11 lines in your changes are missing coverage. Please review.

Comparison is base (b8ce942) 99.05% compared to head (897abcc) 97.75%.

Files	Patch %	Lines
lib/datadog/ci/contrib/minitest/reporter.rb	33.33%	8 Missing ⚠️
lib/datadog/ci/contrib/minitest/helpers.rb	0.00%	2 Missing ⚠️
lib/datadog/ci/contrib/minitest/patcher.rb	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #110      +/-   ##
==========================================
- Coverage   99.05%   97.75%   -1.31%     
==========================================
  Files         147      144       -3     
  Lines        6276     5887     -389     
  Branches      288      288              
==========================================
- Hits         6217     5755     -462     
- Misses         59      132      +73     

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