test: fix `es-module/test-esm-initialization`
The --experimental-import-meta-resolve flag was not supplied, when the target file does use import.meta.resolve. I also cleaned up the comments.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
The --experimental-import-meta-resolve flag was not supplied, when the target file does use import.meta.resolve. I also cleaned up the comments.