[ENG-2898] Fix notice for metadata failed autosave

[fabmiz]

• Ticket: ENG-2898
• Feature flag: n/a

Purpose

When autosave fails on the draft-registration metadata, the notice in the right sidebar is not showing up.

Summary of Changes

• Update DraftRegistrationManager.lastSaveFailed computed property to update on status of onMetadataInput task.
• Make notice red (actually have rules in the notice existing local class)

Side Effects

N/A

QA Notes

• On a draft-registration metadata page, currently, one way to cause an auto-save error is by deleting the autofilled year
  on a license with required fields (for example No License, MIT License); you should see an error toast then in the right sidebar; a notice similar to the one below should show.

[adlius]

We seem to have another .SaveFailed class in draft/style.scss that is not used. Might as well remove that class in favor of this one here.

[fabmiz]

@adlius fixed.

[adlius]

💯