It's important to keep our core log output as clean as possible to avoid 'crying wolf', and so that any deprecations triggered by plugin/theme tests are indeed caused by that theme/plugin, and not core.
This commit will make the core test suite fail if any deprecations are triggered. If a new deprecation is introduced (e.g. as part of a dependency update) and we need more time to resolve it it can be silenced via ember-deprecation-workflow.
This does not affect plugin/theme test runs.
Previously we were trying to handle both async and sync use cases in a single function, but it was confusing to read and led to subtle race conditions. This commit separates the async version into a separate function.
- Count deprecations and print them to the console following QUnit runs
- In GitHub actions, write the same information as a job summary
- Add documentation to `discourse-common/lib/deprecated`
- Introduce `id` and `url` options to `deprecated`
- Introduce `withSilencedDeprecations` helper to allow testing deprecated code paths without making noise in the logs
This was previously reverted in 47035693b7.
