test(backend): kill many any in backend test (partial) (#14054)

* kill any on utils:api

* kill any on timeline test

* use optional chain to kill TS2532 on timeline test
変更前: 該当ノートが見つからなければundefinedに対するプロパティアクセスとしてテストがクラッシュ
変更後: 該当ノートが見つからなければoptional chainがundefinedとして評価されるが、strictEqualの右辺がnon-nullableなためアサーションに失敗しテストがクラッシュ

* kill `as any` for ApMfmService

* kill argument any for api-visibility

* kill argument any across a few tests

* do not return value that has yielded from `await`-ing `Promise<void>`

* force cast

* runtime non-null assertion to coerce

* rewrite `assert.notEqual(expr, null)` to `assert.ok(expr)`
こうすることでassertion type扱いになり、non-nullableになる

* change return type of `failedApiCall` to `void`
戻り値がどこにも使われていない

* split bindings for exports.ts
型が合わなくて文句を言ってくるので適切に分割

* runtime non-null assertion

* runtime non-null assertion

* 何故かうまく行かないので、とりあえずXORしてみる

* Revert "何故かうまく行かないので、とりあえずXORしてみる"

This reverts commit 48cf32c930924840d0892af92d71b9437acb5844.

* castAsErrorで安全ではないキャストを隠蔽

* 型アサーションの追加

* 型アサーションの追加

* 型アサーションの追加

* voidで値を返さない

* castAsError

* assert.ok => kill nullability

* もはや明示的な型の指定は必要ない

* castAsError

* castAsError

* 型アサーションの追加

* nullableを一旦抑止

* 変数を分離して型エラーを排除

* 不要なプロパティを削除する処理を隠蔽してanyを排除

* Repository type

* simple type

* assert.ok => kill nullability

* revert `as any` drop
reverts fe95c05b3f53266108128680d9358a3796844232 partialy

* test: fix invalid assertion
partially revert b99b7b5392d9d20c81dfee1346ba8b33ff9e1fbb

* test: 52d8a54fc7 により型が合うようになった部分の`as any`を除去

* format

* test: apply https://github.com/misskey-dev/misskey/pull/14054#discussion_r1672369526 (part 1)

* test: use non-null assertion to suppress too many error

* Update packages/backend/test/utils.ts

Co-authored-by: anatawa12 <anatawa12@icloud.com>

---------

Co-authored-by: anatawa12 <anatawa12@icloud.com>

packages/backend/test/e2e/clips.ts

@@ -79,14 +79,14 @@ describe('クリップ', () => {
 	};
 
 	const deleteClip = async (parameters: Misskey.entities.ClipsDeleteRequest, request: Partial<ApiRequest<'clips/delete'>> = {}): Promise<void> => {
-		return await successfulApiCall({
+		await successfulApiCall({
 			endpoint: 'clips/delete',
 			parameters,
 			user: alice,
 			...request,
 		}, {
 			status: 204,
-		}) as any as void;
+		});
 	};
 
 	const show = async (parameters: Misskey.entities.ClipsShowRequest, request: Partial<ApiRequest<'clips/show'>> = {}): Promise<Misskey.entities.Clip> => {
@@ -454,25 +454,25 @@ describe('クリップ', () => {
 		let aliceClip: Misskey.entities.Clip;
 
 		const favorite = async (parameters: Misskey.entities.ClipsFavoriteRequest, request: Partial<ApiRequest<'clips/favorite'>> = {}): Promise<void> => {
-			return successfulApiCall({
+			await successfulApiCall({
 				endpoint: 'clips/favorite',
 				parameters,
 				user: alice,
 				...request,
 			}, {
 				status: 204,
-			}) as any as void;
+			});
 		};
 
 		const unfavorite = async (parameters: Misskey.entities.ClipsUnfavoriteRequest, request: Partial<ApiRequest<'clips/unfavorite'>> = {}): Promise<void> => {
-			return successfulApiCall({
+			await successfulApiCall({
 				endpoint: 'clips/unfavorite',
 				parameters,
 				user: alice,
 				...request,
 			}, {
 				status: 204,
-			}) as any as void;
+			});
 		};
 
 		const myFavorites = async (request: Partial<ApiRequest<'clips/my-favorites'>> = {}): Promise<Misskey.entities.Clip[]> => {