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/misc/check-word-mute.ts

@@ -56,7 +56,7 @@ export async function checkWordMute(note: NoteLike, me: UserLike | null | undefi
 
 				try {
 					return new RE2(regexp[1], regexp[2]).test(text);
-				} catch (err) {
+				} catch (_) {
 					// This should never happen due to input sanitisation.
 					return false;
 				}