Campaign capabilities assignments should be refactored.

https://github.com/greenpeace/planet4-master-theme/blob/develop/classes/class-p4-post-campaign.php#L106-L118

These run on every request that hits wordpress and make unnecessary queries to db (possibly only to redis).

These should be moved in a theme activation hook, possibly with a base-fork composer script or post-deploy task

Tasks

• Create a post deploy task for adding the capabilities
• Remind rawalker to remove the capabilities from the docker install
• Create a tag for the default content after the post deploy has been run in default content environment