system.tables -> metadata_path field changed behavior after 25.1

### Company or project name

_No response_

### Describe what's wrong

instead of returning absolute path, now it returns relative path

### Does it reproduce on the most recent release?

Yes

### How to reproduce

compare
24.12 - return absolute path
https://fiddle.clickhouse.com/fb4d6596-84ca-45d7-9d79-e389efe5cc22

25.1 - return relative path
https://fiddle.clickhouse.com/ee838ebc-faf1-4e70-a7c0-69eecd1385ed

### Expected behavior

return absolute path in both versins

### Error message and/or stacktrace

_No response_

### Additional context

maybe someone can suggest how to calculate `` value from `system.*` tables via SQL?