enable and fix no-unused-vars and no-async-promise-executor (#17070)

* dev: set --no-bail for lint task

* lint: enable no-async-promise-executor lint and fix them

* lint: enable no-unused-vars with allowing _ prefix

* lint: fix semi

packages/backend/src/server/api/endpoints/notes/thread-muting/create.ts

@@ -59,7 +59,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				throw err;
 			});
 
-			const mutedNotes = await this.notesRepository.find({
+			const _mutedNotes = await this.notesRepository.find({
 				where: [{
 					id: note.threadId ?? note.id,
 				}, {