Includes cleanup to simplify our setup. Major changes:
- Eliminate the NNBD plugin filtering for stable.
- Remove the temporarily-added beta branch testing.
- Enable Linux, macOS, and web on stable (Windows is LUCI-based)
- Combine the two different macOS matrix configurations now that they
are the same.
- Combine the two different Linux matrix configurations by using a single
Dockerfile (which now also includes clang-format)
- The web integration smoke test temporarily still uses the old Dockerfile,
now renamed, because the driver installer script doesn't support
Chrome 89 yet.
- Move most of the Linux tasks to lower-CPU machines to allow more
tasks to run in parallel without hitting the community limit.
- Reorder the tasks slightly and give them comments to identify
platform groupings
- Enabled web "build all plugins together" and "build all examples"
tests
Plugins that don't actually support iOS are no longer required to have
an iOS stub to prevent build failures. This removes all iOS stubs from
plugins that don't support iOS.
build_all_plugins_app.sh contains an exclusion list, which currently contains almost all of the non-app-facing plugins. However, the script those exclusions are passed to expects federated plugin exclusions to be of the form plugin_name/plugin_name_subplugin_name, not just plugin_name_subplugin_name, so in practice almost nothing on that list has actually been doing anything.
This fixes the script to allow either mode of exclusion (since clearly people expect using just the name to work), and scrubs everything from the list that clearly wasn't actually needed.
