Move admin broadcast messages spinach feature to rspec
What does this MR do?
Replace the Spinach specs for admin broadcast messages with RSpec feature specs as per #23036 (closed)
Does this MR meet the acceptance criteria?
- [-] Changelog entry added
- [-] Documentation created/updated
- [-] API support added
- Tests
- [-] Added for this feature/bug
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All builds are passing
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Conform by the merge request performance guides -
Conform by the style guides -
Branch has no merge conflicts with master
(if it does - rebase it please) -
Squashed related commits together