Replace reliable suite with blocking suite

What does this MR do?

We have deprecated the use of reliable test suite and using a blocking test suite instead. More context found in gitlab-org/quality/quality-engineering&50 (closed).

Related issues

Author checklist

See Definition of done.

For anything in this list which will not be completed, please provide a reason in the MR discussion.

Required

• Merge Request Title and Description are up to date, accurate, and descriptive
• MR targeting the appropriate branch
• MR has a green pipeline on GitLab.com
• When ready for review, follow the instructions in the "Reviewer Roulette" section of the Danger Bot MR comment, as per the Distribution experimental MR workflow

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• Consider using our community forks instead of forking your own project. These community forks have the GitLab API token preconfigured.
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Expected (please provide an explanation if not completing)

• Test plan indicating conditions for success has been posted and passes
• Documentation created/updated
• Tests added/updated
• Integration tests added to GitLab QA
• Equivalent MR/issue for omnibus-gitlab opened gitlab-org/omnibus-gitlab!7562 (merged)
• Equivalent MR/issue for Gitlab Operator project opened (see Operator documentation on impact of Charts changes)
  • Operator does not use reliable QA tag
• Validate potential values for new configuration settings. Formats such as integer 10, duration 10s, URI scheme://user:passwd@host:port may require quotation or other special handling when rendered in a template and written to a configuration file.