Move some of the slowest tests from jest to vitest (#34277)

* Remove doubled-up I18n Provider. ModalManager already provides this.

* Reconfigure svgr into a vite-friendly `?react` resource query

* Move InviteDialog test to vitest

* Move RoomHeader tests to Vitest

* Share serializer between Jest & Vitest

* Attempt to stabilise InviteDialog test

* Fix async leaks

* Iterate based on copilot review

* Fix InviteDialog throttle

* Iterate

* Apply suggestions from code review

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

* Fix lockfile

* Iterate

---------

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

apps/web/test/test-utils/test-utils.ts

@@ -366,6 +366,7 @@ export function createTestClient(): MatrixClient {
         setRoomTag: vi.fn().mockResolvedValue({}),
         getExtendedProfileProperty: vi.fn(),
         setExtendedProfileProperty: vi.fn().mockResolvedValue(undefined),
+        doesServerSupportExtendedProfiles: vi.fn(),
     } as unknown as MatrixClient;
 
     client.reEmitter = new ReEmitter(client);