[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 :warning:
lib/datadog/ci/contrib/minitest/helpers.rb	0.00%	2 Missing :warning:
lib/datadog/ci/contrib/minitest/patcher.rb	50.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ 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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