Rename content_access_proccess_grant to content_access_process_grant

Problem/Motivation

content_access_proccess_grant has a typo in the function name, it should be:

content_access_process_grant

Steps to reproduce

Proposed resolution

Add a new function called content_access_process_grant and deprecate the old, incorrectly named one. Schedule it for removal in 3.0.0

Remaining tasks

User interface changes

API changes

Data model changes