Apparmor denial during cluster bootstrapping

When bootstrapping a new MicroCloud we can see the following apparmor denial pop up.
It doesn't seem to cause any interruption of service but should be identified and properly cleaned up:

```
[ 20.570882] audit: type=1400 audit(1770732137.283:188): apparmor="DENIED" operation="open" class="file" profile="snap.microcloud.microcloud" name="/proc/1008/mountinfo" pid=1008 comm="microcloud" requested_mask="r" denied_mask="r" fsuid=0 ouid=0
```