Fix webhook execution permissions in cron context

[cconard96]

Checklist before requesting a review

• I have read the CONTRIBUTING document.
• I have performed a self-review of my code.
• I have added tests that prove my fix is effective or that my feature works.

Description

• Bypass user permission checks when webhooks fetch data from the new API.
• Abort the session in the /front/cron.php endpoint and then make all entities active. The session may need to be initialized, but I don't know a reason for it to ever be saved so session_abort makes sense even without the entity changes being done here.

Hasn't been tested yet.