Though table wrappers are anonymous block containers (because
TableWrapper is inherited from BlockContainer) with no lines they
should not be skipped in block auto height calculation.
The current config on GitHub Actions does not use ccache, so it takes
quite a while to build. Instead, let's just run these tests on Azure
where we already build Ladybird and have ccache enabled. This also lets
us sanitize LibWeb on both Linux and macOS.
The script changes here are to A) handle differences between Azure and
GitHub Actions and B) to support running on macOS.
