Relate existing failure issues upon test failures or create new ones

This adds a new --relate-failure-issue option to exe/gitlab-qa-report that does a few things:

1. Detect existing QA failure issue in the $QA_FAILURES_REPORTING_PROJECT project (https://gitlab.com/rymai/gitlab-qa-issues/ is used in this MR for testing purpose)
   • The detection is done in two steps:
     1. Detect issues with a title that includes the test path or description
     2. Among the potential issues, select the one for which the stacktrace is the closest to the failed test's one (a 5% diff margin is allowed).
2. If no issue could be detected, this will create a new issue (e.g. https://gitlab.com/rymai/gitlab-qa-issues/-/issues/13)
3. It will mark the QA failure issue as related to the testcase issue (e.g. https://gitlab.com/rymai/gitlab-qa-issues/-/issues/13).

Note:

1. Before we enable this globally, we can define the QA_FAILURES_REPORTER_OPTIONS: "--dry-run" variable to only print a message instead of creating/updating issues.
2. A --max-diff-ratio option is available to fine-rune the threshold above which we don't consider two stacktraces similar (this can be set as part of QA_FAILURES_REPORTER_OPTIONS).

Related to https://gitlab.com/gitlab-org/quality/team-tasks/-/issues/586.