tests: add test for spread.Projects.Jobs() wildcard

[mvo5]

This adds a small test around 2d0883b - its quite indirect, I wonder if instead I should just add an export_test.go and export evalstr() there.

However it does test what I added the wildcard support for so maybe useful. But happy to convert into something that tests evalstr() directly too.

[vosst]

I tend to like the e2e test a little better than only exercising evalstr in isolation. LGTM