enhance(backend/test): Migrate tests to vitest (#16935)

* wip

* update fake-timers and migrate

* fix

* remove jest-mock

* fix

* fix

* fix

* fix

* attempt to fix unit tests

* attempt to fix e2e tests

* fix federation test [ci skip]

* attempt to fix e2e tests

* fix typecheck

* fix unit tests

* fix

* attempt to fix e2e

* fix

* Revert "attempt to fix e2e"

This reverts commit b7b7b05d85.

* attempt to fix e2e

* revert attempt to fix e2e

* update deps

* update vitest

* migrate

* attempt to fix e2e

* update

* fix

* remove vite swc plugin as oxc parser can handle decorators

* attempt to fix drive/files/create test

* Revert "attempt to fix drive/files/create test"

This reverts commit 4715153375.

* fix: エンドポイントにまつわるテストをunitからe2eに移動

* attempt to fix e2e

* remove swc

* attempt to fix e2e

* Revert "attempt to fix e2e"

This reverts commit 9fb86a4076.

* add logs for debug

* attempt to fix e2e

* Partially revert "attempt to fix e2e"

This reverts commit fb0008c85a.

* attempt to fix test

* fix: attempt to fix test

* Revert "fix: attempt to fix test"

This reverts commit ed2f5c40e8.

* Revert "attempt to fix test"

This reverts commit d7329c46f1.

* attempt to fix e2e

* fix: surpass eventemitter warning by increasing defaultMaxListeners

* attempt to fix e2e

* fix

* fix e2e not ending properly

* exp: add hanging-process reporter for investigation

* Revert "exp: add hanging-process reporter for investigation"

This reverts commit 26851f8282.

* update changelog

packages/backend/test/tsconfig.json

@@ -3,7 +3,7 @@
 		"allowJs": true,
 		"noEmitOnError": false,
 		"noImplicitAny": true,
-		"noImplicitReturns": true,
+		"noImplicitReturns": false,
 		"noUnusedParameters": false,
 		"noUnusedLocals": false,
 		"noFallthroughCasesInSwitch": true,
@@ -35,7 +35,7 @@
 		"lib": [
 			"esnext"
 		],
-		"types": ["jest", "node"]
+		"types": ["node"]
 	},
 	"compileOnSave": false,
 	"include": [