Secure backup tweaks (#2277)

* Use a custom SDK build that might fix incomplete recovery state false positives. Enable chat backup by default

* Get rid of the chat backup feature flag

* Fix force unwrap warning

* Fix long line warning

* Prevent the recovery key confirmation banner popping up before the verification state is fetched. Stop showing secure backup user avatar and menu badges while the session is not verified.

* Switch back to the release version of the SDK

* Fix inconsistent session verification states, improve/simplify how to deal with it

* Fix unit tests

* Cleanup and hopefully simplify home screen banner presentations

ElementX/Sources/Services/Session/UserSessionProtocol.swift

@@ -18,8 +18,6 @@ import Combine
 import Foundation
 
 enum UserSessionCallback {
-    case sessionVerificationNeeded
-    case didVerifySession
     case didReceiveAuthError(isSoftLogout: Bool)
 }
 
@@ -32,6 +30,7 @@ protocol UserSessionProtocol {
     var mediaProvider: MediaProviderProtocol { get }
     var voiceMessageMediaManager: VoiceMessageMediaManagerProtocol { get }
     
+    var sessionVerificationState: CurrentValuePublisher<Bool?, Never> { get }
     var sessionVerificationController: SessionVerificationControllerProxyProtocol? { get }
     
     var callbacks: PassthroughSubject<UserSessionCallback, Never> { get }