Build CI: Fix configuration of coverage upload action

[mkoeppe]

Fixes #36620

📝 Checklist

• The title is concise, informative, and self-explanatory.
• The description explains in detail what this PR is about.
• I have linked a relevant issue or discussion.
• I have created tests covering the changes.
• I have updated the documentation accordingly.

⌛ Dependencies

[github-actions]

Documentation preview for this PR (built with commit f800cf8; changes) is ready! 🎉

[tobiasdiez]

Seems to work fine. Thanks. Any idea about what's the issue? Do you add any symlinks in the worktree folder? The underlying issue here might be the same one that also gives the "out of space" exception.

[mkoeppe]

Seems to work fine. Thanks.

So let's get it in.

Any idea about what's the issue?

The config was asking to search the whole worktree-image for coverage files.

[fchapoton]

seems to be reasonable

[mkoeppe]

Thanks!