[Bug 2092232] Re: unable to deploy Plucky Puffin due to AppArmor lsblk denials

@patricia that one should be fixed by
https://bugs.launchpad.net/maas/+bug/2104530 . The hotfix will be rolled
out to TOR3 tomorrow.

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https://bugs.launchpad.net/bugs/2092232

Title:
unable to deploy Plucky Puffin due to AppArmor lsblk denials

Status in MAAS:
Invalid
Status in The Ubuntu-power-systems project:
Confirmed
Status in apparmor package in Ubuntu:
New
Status in linux package in Ubuntu:
Incomplete

Bug description:
Describe the bug:

Deployment fails on Power9 and Power10 nodes when trying with Ubuntu
25.04/Plucky Puffin


Actual behavior (what actually happened?):
```
Thu, 19 Dec. 2024 17:38:22 Marking node failed - Node operation 'Deploying' timed out after 30 minutes.
Thu, 19 Dec. 2024 17:38:22 Node changed status - From 'Deploying' to 'Failed deployment'
Thu, 19 Dec. 2024 17:08:06 Node installation - 'cloudinit' running config-keys_to_console with frequency once-per-instance
Thu, 19 Dec. 2024 17:08:06 Node installation - 'cloudinit' running config-power_state_change with frequency once-per-instance
Thu, 19 Dec. 2024 17:08:06 Node installation - 'cloudinit' running config-install_hotplug with frequency once-per-instance
Thu, 19 Dec. 2024 17:08:06 Node installation - 'cloudinit' running config-ssh_authkey_fingerprints with frequency once-per-instance
Thu, 19 Dec. 2024 17:08:06 Node installation - 'cloudinit' running config-final_message with frequency always
Thu, 19 Dec. 2024 17:08:06 Rebooting
```

Looking its console, it seems deployment has finished quickly:
```
-----END SSH HOST KEY KEYS-----
[ 29.557514] cloud-init[755]: Cloud-init v. 24.4-0ubuntu1 finished at Thu, 19 Dec 2024 17:10:00 +0000. Datasource DataSourceNone. Up 29.55 seconds
[ 29.557942] cloud-init[755]: 2024-12-19 17:10:00,978 - cc_final_message.py[WARNING]: Used fallback datasource
...

[ 29.563198] cloud-init[755]: +----[SHA256]-----+

Ubuntu Plucky Puffin (development branch) ubuntu hvc0

ubuntu login:
ubuntu login:
```
but either way MAAS deployment fails.

MAAS version: 3.5.2


Additional context:
a) I'm able to deploy the same system, via MAAS, when trying with Jammy/Noble/Oracular
b) Also able to deploy with Plucky Puffin .ISO image (also on the same system - P10rain-LPAR09).

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