Errors in computed data should report original location of source code in data cascade

[dd-pardal]

Describe the bug

Templating errors in permalinks get logged as templating errors in files, even if the permalink is not defined in the file's front matter.

To Reproduce

Steps to reproduce the behavior:

1. Create a file named page.md with any content (doesn't need front matter).

2. Create a file named page.11tydata.json.

3. Insert the following code in page.11tydata.json:

    {
      "permalink": "{{+}}"
    }
   

4. Run eleventy.

5. Eleventy logs:

    Problem writing Eleventy templates: (more in DEBUG output)
    > Having trouble rendering md template ./page.md
   

Expected behavior

Eleventy to log something like:

Problem writing Eleventy templates: (more in DEBUG output)
> Having trouble parsing the permalink for ./page.md using liquid template engine

Environment:

• OS and Version: Windows 10 Home 1909
• Eleventy Version 0.10.0

Additional context

This really confused me, in combination with #1019.