ci: Move doctests to a separate parallel job (#38111)
Martin Pool
created
Follow on from #37851
This may reduce CI time by running doctests in parallel with other
tests. It also makes it easier to find the results.
Example output:
https://github.com/zed-industries/zed/actions/runs/17698218116/job/50300398669?pr=38111
At least on this run, the doctests finished before the main Linux tests,
which makes sense because there are many fewer doctests. So they should
not be on the critical path.
Thanks @maxdeviant for the prompt.
<img width="615" height="513" alt="image"
src="https://github.com/user-attachments/assets/bcafa636-a68c-4602-97f4-61f7904e6a7b"
/>
Release Notes:
- N/A