Add AppArmor notice for Debian/Ubuntu users during server startup

Add AppArmor notice for Debian/Ubuntu users during server startup

When MariaDB fails to start due to permission errors, users on
Debian/Ubuntu might not be able to guess that AppArmor might be the
cause, and they should check for AppArmor denials in the kernel audit
log.

Add an informational message during startup that:
- Only prints when the 'mariadbd' profile is actually loaded
- Includes exact commands from the Debian packaging NEWS
- Provides actionable paths for local overrides
- Mentions both complain and enforce modes for troubleshooting

The message is printed once during normal server startup (not in help or
bootstrap modes) through the existing logging infrastructure, ensuring
it appears in both syslog and the error log where users will see it when
troubleshooting startup failures.

Forwarded: https://github.com/MariaDB/server/pull/5003

Gbp-Pq: Name Add-AppArmor-notice-for-Debian-Ubuntu-users-during-server.patch