Update snapd warning after kernel support for apparmor lands

[TraceyC77]

See the parent issue for details about the current status of apparmor support

In https://github.com/getsolus/packages/pull/4632 we updated the wording when a user runs snaps

      echo -e "${YELLOW}WARNING:${NC} snap is running with ${CONFINEMENT} confinement." \
        "Snaps will stop working in early January 2025. See ${URL} for details"

Remove "Snaps will stop working" (they will still work if installed manually) Update as appropriate after AppArmor support lands in the kernel

Update it on the Help Center as well https://github.com/getsolus/help-center-docs/issues/592

[TraceyC77]

I've updated this to reflect that upstream support for AppArmor is expected in the 6.15 kernel I also moved it to the 5.0 milestone, since the team decided it is likely not going to be ready by the time we're ready to publish 4.8, and it would put too much into that milestone