This commit updates the ad plugin to support the Glimmer Post Stream and refactors ad rendering logic for improved compatibility and maintainability.
Key changes:
- Introduce glimmer_post_stream_mode compatibility across all ad types and test suites.
- Replace .widget-connector with .ad-connector for ad placement after posts.
- Migrate initialize-ad-plugin.js to initialize-ad-plugin.gjs to leverage Glimmer and API improvements.
- Use withSilencedDeprecations to handle widget overrides for post ads.
- Update compatibility constraints in .discourse-compatibility.
- Refactor and expand acceptance tests for AdSense, DFP, and House Ads to run with both Glimmer and legacy post stream modes.
Changes in 0948d6b19e caused the post-bottom-ad component to start receiving the widget-ised 'transformedPost' instead of the original `post` model. In most cases this difference didn't matter, but it did cause noticable issues with `@model.category` and `@model.topic`.
This commit also deletes the unused `post-bottom/discourse-adplugin.hbs` connector. In the past, the adplugin itself was defining the post-bottom outlet. But now, we use RenderGlimmer to load the `post-bottom-ad` directly.