Admin Menu: Add "Tools -> Export/Erase Personal Data" to Simple sites (#44430)

Add the "Tools -> Export Personal Data" and "Tools -> Erase Personal Data" menus to Simple sites. Since we cannot display the Core screens there (see p4H3ND-1TK-p2), we're showing a callout letting users know how they can comply with the GDPR requirements.

Committed via a GitHub action: https://github.com/Automattic/jetpack/actions/runs/16517195108

Upstream-Ref: Automattic/jetpack@7a64cd5

Author: mmtr