[v20.x] module: bootstrap module loaders in shadow realm
/cc @UlisesGascon
Setting the PR target as v20.x-staging-backport because v20.x-staging has partial commits from #48655.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
/cc @UlisesGascon
Setting the PR target as v20.x-staging-backport because v20.x-staging has partial commits from #48655.