[7830] Update log level for duplicate item drop target

[jvega190]

#7830

Summary by CodeRabbit

• Bug Fixes
  • Updated the duplicate-item drag warning to display as a required message instead of an informational notice.

[coderabbitai]

Walkthrough

The duplicate-item drag warning now uses the required message level instead of info.

Changes

Guest drag warning

Layer / File(s)	Summary
Update warning severity studio-ui/ui/guest/src/store/epics/root.ts	The duplicate-item snackGuestMessage severity changes from info to required.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Suggested reviewers: jmendeza

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly identifies the log-level update for duplicate item drop target handling.
Description check	✅ Passed	The description provides the ticket reference required by the repository template.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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