Setup step is copying system data file 'C:\templatedata\master.mdf' to '/var/opt/mssql/data/master.mdf'

I got these logs running a `DistributedApplicationTestingBuilder` test on Linux:

```
[2025-10-21 11:33:40Z] info: AspireHost.Resources.sqlServer[0]
5: 2025-10-21T11:33:40.2582563Z 2025-10-21 11:33:40.19 Server Setup step is copying system data file 'C:\templatedata\master.mdf' to '/var/opt/mssql/data/master.mdf'.
[2025-10-21 11:33:40Z] info: AspireHost.Resources.sqlServer[0]
6: 2025-10-21T11:33:40.3072981Z
[2025-10-21 11:33:40Z] info: AspireHost.Resources.sqlServer[0]
7: 2025-10-21 11:33:40.30 Server Did not find an existing master data file /var/opt/mssql/data/master.mdf, copying the missing default master and other system database files. If you have moved the database location, but not moved the database files, startup may fail. To repair: shutdown SQL Server, move the master database to configured location, and restart.
[2025-10-21 11:33:40Z] info: AspireHost.Resources.sqlServer[0]
8: 2025-10-21T11:33:40.3110777Z
[2025-10-21 11:33:40Z] info: AspireHost.Resources.sqlServer[0]
9: 2025-10-21 11:33:40.30 Server Setup step is copying system data file 'C:\templatedata\mastlog.ldf' to '/var/opt/mssql/data/mastlog.ldf'.
[2025-10-21 11:33:40Z] info: AspireHost.Resources.sqlServer[0]
10: 2025-10-21T11:33:40.3225828Z
[2025-10-21 11:33:40Z] info: AspireHost.Resources.sqlServer[0]
11: 2025-10-21 11:33:40.31 Server Setup step is copying system data file 'C:\templatedata\model.mdf' to '/var/opt/mssql/data/model.mdf'.
[2025-10-21 11:33:40Z] info: AspireHost.Resources.sqlServer[0]
12: 2025-10-21T11:33:40.3541932Z
[2025-10-21 11:33:40Z] info: AspireHost.Resources.sqlServer[0]
13: 2025-10-21 11:33:40.35 Server Setup step is copying system data file 'C:\templatedata\modellog.ldf' to '/var/opt/mssql/data/modellog.ldf'.
[2025-10-21 11:33:40Z] info: AspireHost.Resources.sqlServer[0]
14: 2025-10-21T11:33:40.3849718Z
[2025-10-21 11:33:40Z] info: AspireHost.Resources.sqlServer[0]
15: 2025-10-21 11:33:40.38 Server Setup step is copying system data file 'C:\templatedata\msdbdata.mdf' to '/var/opt/mssql/data/msdbdata.mdf'.
```

I have no mounts for the `sqlServer` resource.

I don't see any errors, but it doesn't feel good.