Add override for unconfined apparmor profile :sparkles:

[Ser87ch]

Description

• Adds override for the unconfined AppArmor profile.
• Adds AppArmorBadValue for an unsupported AppArmor profile value.
• Adds Override Errors section to the apparmor documentation.

Fixes #442

Type of change

• [ X] New feature :sparkles:
• [ X] This change requires a documentation update :book:

How Has This Been Tested?

• Automated tests.

Checklist:

• [ ] I have :tophat: my changes (A 🎩 specifically includes pulling down changes, setting them up, and manually testing the changed features and potential side effects to make sure nothing is broken)
• [X] I have performed a self-review of my own code
• [X] I have made corresponding changes to the documentation
• [X] I have added tests that prove my fix is effective or that my feature works
• [X] New and existing unit tests pass locally with my changes
• [X] The test coverage did not decrease
• [X] I have signed the appropriate Contributor License Agreement