Draft: Remove two flaky examples from reliable
What does this MR do and why?
Removes two flaky examples that were recently promoted from reliable. In both cases it was a repeated intermittent failure from the past that happened within a week of promotion so it doesn't justify the risk of keeping the tests in reliable bucket and blocking pipelines. See gitlab-org/quality/testcases#3335 (closed) and gitlab-org/quality/testcases#2226 (closed).
Affected examples:
- /qa/qa/specs/features/ee/browser_ui/3_create/repository/file_locking_spec.rb | Create File Locking locks a directory and tries to push as a second user
- /qa/qa/specs/features/api/3_create/repository/files_spec.rb | Create API basics user creates a project with a file and deletes them afterwards
Also removes raw file access sets no-cache headers as expected
from E2Es altogether as it is sufficiently covered at the lower level with https://gitlab.com/gitlab-org/gitlab/-/blob/368a4c8a002ab27fe35233da056a65c0c91144ff/spec/requests/api/files_spec.rb#L852.
MR acceptance checklist
This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.
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I have evaluated the MR acceptance checklist for this MR.