fix: useEventBus by propagating config to DefaultEventsService

This setting was added by reading from an optional `config` argument.
This was never passed, so `auto` was always assumed.
https://github.com/backstage/backstage/pull/27227/files#diff-cffd40a187b4fc584f03c968517fbacc110bde6a467f2384bbd92b803d3db47eR374-R379

Signed-off-by: RedlineTriad <39059512+RedlineTriad@users.noreply.github.com>

plugins/events-node/src/service.ts

@@ -42,9 +42,10 @@ export const eventsServiceFactory = createServiceFactory({
     logger: coreServices.logger,
     lifecycle: coreServices.lifecycle,
     auth: coreServices.auth,
+    config: coreServices.rootConfig,
   },
-  async createRootContext({ rootLogger }) {
-    return DefaultEventsService.create({ logger: rootLogger });
+  async createRootContext({ rootLogger, config }) {
+    return DefaultEventsService.create({ logger: rootLogger, config });
   },
   async factory(
     { pluginMetadata, discovery, logger, lifecycle, auth },