systemd warns about legacy path in tmpfiles.conf drop-in

**Platform I'm building on:**
`aws-ecs-2-nvidia` on `g6f.large`

**What I expected to happen:**
No errors from `nvidia.conf` visible in `journalctl -p5`.

**What actually happened:**
```
Nov 08 23:21:22 localhost systemd-tmpfiles[2282]: /x86_64-bottlerocket-linux-gnu/sys-root/usr/lib/tmpfiles.d/nvidia.conf:11: Line references path below legacy directory /var/run/, updating /var/run/nvidia-persistenced → /run/nvidia-persistenced; please update the tmpfiles.d/ drop-in file accordingly.
```

**How to reproduce the problem:**
Check the journal with this variant and instance type.

Start with the nvidia.conf drop-in identified in the warning, especially line 11, and review the journal output from the aws-ecs-2-nvidia variant on a g6f.large instance. Done means the drop-in no longer produces the legacy /var/run warning in journalctl -p5.

Written by the indexing model from the issue text.