Fix bug on MR title ending with draft/wip <- case in point

What does this MR do?

Fix bug on MR title ending with draft/wip being marked as draft.

An MR title should be able to end with draft or wip without the MR itself being marked as draft. When a draft MR has a title ending with draft or wip, changing the MR to be ready should not remove the relevant draft or wip words from the title.

Screenshots (strongly suggested)

Before:

After:

Does this MR meet the acceptance criteria?

Conformity

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• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
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Related to #324212 (closed)