Privacy: Un-map privacy capabilities to make them available to be assigned for custom roles:

* `erase_others_personal_data`
* `export_others_personal_data`
* `manage_privacy_options`

Previously mapped to `manage_options` or `manage_network` (on Multisite), these are now added to the Administrator role separately.

Additionally, `manage_privacy_options` is added to the Editor role.

Props garrett-eclipse, xkon, pbiron, desrosj, johnbillion, flixos90, juliobox, lakenh, Ov3rfly, ianatkins.
Fixes #44176.
Built from https://develop.svn.wordpress.org/trunk@47269


git-svn-id: https://core.svn.wordpress.org/trunk@47069 1a063a9b-81f0-0310-95a4-ce76da25c4cd