CI: Generating the e2e test matrix

[kantai]

This PR is a first pass at trying to generate the test matrix automatically. Right now, I'm just trying to make sure that it gets a single test to run using the excludes functions. Once I'm convinced that works, I'll update it to match the current exclusion set.

[wileyj]

interesting!

have you considred nextest's filtersets here as well? we'd still need a matrix, but the pattern matching might be easier than what you're doing here

https://nexte.st/docs/filtersets/

[kantai]

have you considred nextest's filtersets here as well? we'd still need a matrix, but the pattern matching might be easier than what you're doing here

After looking into it, I don't think it would help that much. The filterset language doesn't support matching "ignored" only (which is how we indicate these tests), so it would only be helpful to match the binary stacks-node. But it wouldn't change the jq filter at all, because the JSON still needs to be altered to match the matrix spec.

[wileyj]

this is neat! the only thing we should be aware of is it'll be easy to overwhelm the amount of tests in the matrix, so it's something we'll want to keep an eye on over time.

[obycode]

LGTM and opened #5802 for future enhancement.