Permissions for Detection Engineers with extended granularity

**Value proposition**
Allows admin to setup roles with different levels of privilege for managing Security Rules, Exceptions and Alerts to achieve the principle of the least privilege.

**Expected outcome**
New permissions available for users to setup desired roles.
New prebuilt roles utilizing new privileges combinations.

**Key user stories / use cases**
As an admin, I want to allow Analysts to view Rules, and add Exceptions to them.
As an admin, I want to specify roles, that can view and enable Rules without the ability to modify their logic.
As an admin, I want to specify roles, that can modify Rules and the Automatic gap remediation settings.