Fix notices on Campaign preferences form

[eileenmcnaughton]

Overview

Update campaign prefs form in line with related PR - #13022 & releated

Before

After

notices fixed

Technical Details

Uses metadata & shared code after the change

Comments

[civibot]

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[seamuslee001]

Confirmed that the e-notices disappear, the settings are still rendered correctly and that the appropriate description is there. Approved, adding merge on pass