Mark setUp of RCO tests as async and throwing

Signed-off-by: Claudio Cambra <developer@claudiocambra.com>

Author: claucambra

Tests/NextcloudFileProviderKitTests/RemoteChangeObserverTests.swift

@@ -38,10 +38,10 @@ final class RemoteChangeObserverTests: XCTestCase {
     var remoteChangeObserver: RemoteChangeObserver?
     var dbManager: FilesDatabaseManager!
 
-    override func setUp() {
+    override func setUp() async throws {
         Realm.Configuration.defaultConfiguration.inMemoryIdentifier = name
         dbManager = FilesDatabaseManager(realmConfig: .defaultConfiguration, account: Self.account)
-        Task { try await Self.notifyPushServer.run() }
+        try await Self.notifyPushServer.run()
     }
 
     override func tearDown() async throws {