ci: Use gitlab_quality-test_tooling to report test failures

What does this MR do and why?

This makes create-issues-for-failing-tests use the new gitlab_quality-test_tooling gem instead of the custom scripts/pipeline/create_test_failure_issues.rb script to report test failures.

This is part of Q2 OKR to consolidate tooling around test reporting, specifically iteration 2.

This currently creates issues in https://gitlab.com/gitlab-org-sandbox/rails-test-failures/-/issues for now for the following reasons:

• assess the number of issues created
• assess the accuracy of the de-duplication logic
• ensure people subscribed to labels (e.g. group labels) aren't "spammed" by these issues

At any time, the automatic issue creation can be disabled by setting CREATE_RAILS_TEST_FAILURE_ISSUES to false.

Depends on !122173 (merged).

Examples

• gitlab-org-sandbox/rails-test-failures#4 (closed)

MR acceptance checklist

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