Add a migration to expire sync sessions so that m.space.* state is up to date. (#4482)

ElementX/Sources/Services/Client/ClientProxy.swift

@@ -410,6 +410,10 @@ class ClientProxy: ClientProxyProtocol {
         }
     }
     
+    func expireSyncSessions() async {
+        await syncService.expireSessions()
+    }
+    
     func accountURL(action: AccountManagementAction) async -> URL? {
         try? await client.accountUrl(action: action).flatMap(URL.init(string:))
     }

ElementX/Sources/Services/Client/ClientProxyProtocol.swift

@@ -140,6 +140,8 @@ protocol ClientProxyProtocol: AnyObject {
     func stopSync()
     
     func stopSync(completion: (() -> Void)?) // Hopefully this will become async once we get SE-0371.
+    
+    func expireSyncSessions() async
         
     func accountURL(action: AccountManagementAction) async -> URL?