This reverts commit b0606d90f0.
This seems to prevent libegl-mesa0 from being installed (which for some
reason isn't failing the Azure jobs - the failure seen later is that
ccache is not installed).
Not a huge deal because this at least would still differ from the UCD
cache due to the locale_data.cmake. But this will use the same cache key
as other CI jobs.
These are used by esvu, and it is sad that we don't have macOS binaries
availble for consumption by esvu users. Add a matrix job to handle this
separately from the test262 results.
