Add a CLI test for MRVA with multiple queries

[robertbrignull]

This PR adds a simple test for running MRVA with two queries. This was actually quite easy because we can re-use the doVariantAnalysisTest method with only very small changes.

There are more edge cases of course, but I think they're mostly covered by the no-workspace integration tests. In the CLI tests which are even slower to run, I hope it's ok to just run a single MRVA with two queries and that shows that the process works.

There is already a test for running queries from a published pack, so we don't need to add anything more for that.

Checklist

• CHANGELOG.md has been updated to incorporate all user visible changes made by this pull request.
• Issues have been created for any UI or other user-facing changes made by this pull request.
• [Maintainers only] If this pull request makes user-facing changes that require documentation changes, open a corresponding docs pull request in the github/codeql repo and add the ready-for-doc-review label there.

[charisk]

Generally looking good. Let's make sure the tests pass in the various versions of the CLI that we expect them too. Would be good to run the CLI tests workflow against your branch.

[robertbrignull]

Let's make sure the tests pass in the various versions of the CLI that we expect them too. Would be good to run the CLI tests workflow against your branch.

Good point the test should only run on supported CLI versions.

I'm a bit confused why it's currently failing on the latest CLI version as it passed locally. I'll take a look.

[robertbrignull]

Run of all CLI tests: https://github.com/github/vscode-codeql/actions/runs/7900721664 (updated)

[robertbrignull]

The CLI tests are all green. Should be ready for re-review now.

[charisk]

🚢